update max015,

.gitattributes

@@ -0,0 +1,31 @@
+*.mp4 filter=lfs diff=lfs merge=lfs
+*.zip filter=lfs diff=lfs merge=lfs
+*.7z filter=lfs diff=lfs merge=lfs
+*.tar.gz filter=lfs diff=lfs merge=lfs
+*.jpg filter=lfs diff=lfs merge=lfs
+*.png filter=lfs diff=lfs merge=lfs
+*.avif filter=lfs diff=lfs merge=lfs
+*.webm filter=lfs diff=lfs merge=lfs
+*.mkv filter=lfs diff=lfs merge=lfs
+
+# Documents
+*.doc	diff=astextplain
+*.DOC	diff=astextplain
+*.docx	diff=astextplain
+*.DOCX	diff=astextplain
+*.dot	diff=astextplain
+*.DOT	diff=astextplain
+*.pdf	diff=astextplain
+*.PDF	diff=astextplain
+*.rtf	diff=astextplain
+*.RTF	diff=astextplain
+
+*.gif filter=lfs diff=lfs merge=lfs
+*.GIF filter=lfs diff=lfs merge=lfs
+*.bmp filter=lfs diff=lfs merge=lfs
+*.BMP filter=lfs diff=lfs merge=lfs
+*.tiff filter=lfs diff=lfs merge=lfs
+*.TIFF filter=lfs diff=lfs merge=lfs
+*.wav filter=lfs diff=lfs merge=lfs
+*.WAV filter=lfs diff=lfs merge=lfs
+*.log filter=lfs diff=lfs merge=lfs

.gitignore

@@ -0,0 +1 @@
+**/~*.*

CDS2003_assignment01/quotation.md

@@ -0,0 +1,5 @@
+chakmanchung@ln.hk
+Password:@Mc1234567
+
+hurry
+HKD 200

CDS2003_assignment01/src/Q1.py

@@ -0,0 +1,6 @@
+'''
+Draft a python script to 
+Count down a nonnegative number to zero
+  n,n— 1, n — 2, ...,0
+
+'''

CDS2003_assignment02/_ref/digest.md

@@ -0,0 +1,19 @@
+## Mandatory
+
+- P01: Please use recursion to define and test a function to calculate the sum of a list of numbers.
+  `def list_sum_Recur(num_list):`
+- P02: Please use recursion to define and test a function to find the greatest common division of two positive integers.
+  `def gcd_Recur(a,b):`
+- P03: Please use recursion to define and test a function to calculate the harmonic series upto `n` terms.
+  `def harmonic_sum_Recur(n):`
+- P04: Please use recursion to define and test a function to calculate the value of 𝑥 to the power of `n`.
+  `def power_Recur(x,n):`
+
+## Optional
+
+- P05: Please use recursion to define and test a function to accept a decimal integer and display its binary equivalent.
+  `def Dec2Binary_Recur(num):`
+- P06: Please use recursion to define and test a function to take in a string and returns a reversed copy of the string.
+  `def reverse_Recur(a,b):`
+- P07: Please use recursion to define and test a function to check whether a number is Prime or not.
+  `def isPrime_Recur(a,b):`

CDS2003_assignment02/dist/moodle.md

@@ -0,0 +1,20 @@
+P01
+https://leetcode.com/playground/gZTt9LMe
+
+P02
+https://leetcode.com/playground/CsnfvkZe
+
+P03
+https://leetcode.com/playground/Ga3kggri
+
+P04
+https://leetcode.com/playground/R6Xh2hnB
+
+P05
+https://leetcode.com/playground/8DPfAMSb
+
+P06
+https://leetcode.com/playground/CsnfvkZe
+
+P07
+https://leetcode.com/playground/H9BecSM9

CDS2003_assignment02/gitUpdate.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+set -ex
+
+git add .
+
+git commit -m"update max015,"
+
+git push

CDS2003_assignment02/quotation.md

@@ -0,0 +1,7 @@
+chakmanchung@ln.hk
+Password:@Mc1234567
+
+hurry
+HKD 200
+
+https://www.leetcode.com

CDS2003_assignment02/src/P01.py

@@ -0,0 +1,33 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Please use recursion to define and test a function to calculate the sum of a list of numbers.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def list_sum_Recur(num_list):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+import sys
+sys.setrecursionlimit(999999)
+
+def list_sum_Recur(num_list):
+    # implementation here
+    if len(num_list) == 1:
+        return num_list[0]
+    else:
+        return num_list[0] + list_sum_Recur(num_list[1:])
+
+# test here
+def test_list_sum_Recur():
+    print(list_sum_Recur([1, 2, 3, 4, 5]))
+    print( (1+5)*5 / 2)
+
+    print(list_sum_Recur(list(range(1,9999+1))))
+    print( (1+9999)*9999 / 2)
+
+test_list_sum_Recur()

CDS2003_assignment02/src/P02.py

@@ -0,0 +1,73 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Background
+The greatest common divisor (GCD) of integers a and b, at least one of which is nonzero, is the greatest positive integer d such that d is a divisor of both a and b; that is, there are integers e and f such that a = de and b = df, and d is the largest such integer. The GCD of a and b is generally denoted gcd(a, b).[8]
+
+When one of a and b is zero, the GCD is the absolute value of the nonzero integer: gcd(a, 0) = gcd(0, a) = |a|. 
+This case is important as the terminating step of the Euclidean algorithm.
+
+The above definition is unsuitable for defining gcd(0, 0), since there is no greatest integer n such that 0 × n = 0. 
+However, zero is its own greatest divisor if greatest is understood in the context of the divisibility relation, 
+so gcd(0, 0) is commonly defined as 0. 
+This preserves the usual identities for GCD, and in particular Bézout's identity, 
+namely that gcd(a, b) generates the same ideal as {a, b}.[9][10][11] 
+This convention is followed by many computer algebra systems.[12] 
+Nonetheless, some authors leave gcd(0, 0) undefined.[13]
+
+# Requirement
+Please use recursion to define and test a function to find the greatest common division of two positive integers.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def gcd_Recur(a,b):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+lteration = 0
+def gcd_Recur(a,b):
+    # implementation here
+    global lteration
+
+    # https://proofwiki.org/wiki/GCD_for_Negative_Integers
+    if a < 0 or b < 0:
+        print("Conservative result: tested number more reasonable if greater than 1")
+
+    if a == 0 and b == 0:
+        return 0
+
+    if b == 0:
+        return a
+    else:
+        lteration+=1
+        return gcd_Recur(abs(b), abs(a % b))
+
+# test here
+def test_gcd_Recur():
+    global lteration
+    input_list = [
+        # from wiki: gcd(54,24) = 6
+        (54,24),
+        # from wiki: gcd(8, 12) = 4 
+        (8,12), 
+
+        # for no gcd
+        (5,7), 
+        
+        (-12,3), (-12,0),(12,-1),
+        
+        # https://en.wikipedia.org/wiki/Greatest_common_divisor
+        # from wiki: gcd(0, 0) is commonly defined as 0
+        (0,0),
+        
+        # https://en.wikipedia.org/wiki/Greatest_common_divisor
+        # from wiki: When one of a and b is zero, the GCD is the absolute value of the nonzero integer: gcd(a, 0) = gcd(0, a) = |a|. 
+        (0,6), (1,0), 
+        (0,88),(99,0)]
+    for a,b in input_list:
+        lteration = 0
+        print("gcd of ", a, " and ", b, " is: ", gcd_Recur(a,b))
+
+test_gcd_Recur()

CDS2003_assignment02/src/P03.py

@@ -0,0 +1,47 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Background
+In mathematics, the harmonic series is the infinite series formed by summing all positive unit fractions.
+
+# Requirement
+Please use recursion to define and test a function to calculate the harmonic series upto `n` terms.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def gcd_Recur(a,b):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+import sys
+sys.setrecursionlimit(999999)
+
+lteration = 0
+def harmonic_series_Recur(n):
+    # implementation here
+    global lteration
+
+    # https://en.wikipedia.org/wiki/Harmonic_series_(mathematics)
+    if lteration == 0 and n < 1:
+        return "Error: n should equal or lager than 1"
+    if lteration == 0 and n == 0:
+        return 1
+    if n == 1:
+        return 1
+    else:
+        lteration +=1 
+        return 1/n + harmonic_series_Recur(n-1)
+
+# test here
+def test_harmonic_series_Recur():
+    global lteration
+    n_list = [-10,-1,0,1,5, 99, 9999]
+
+    for n in n_list:
+        print("result of ", n, ' is : ', harmonic_series_Recur(n))
+        lteration = 0
+
+if __name__ == '__main__':
+    test_harmonic_series_Recur()

CDS2003_assignment02/src/P04.py

@@ -0,0 +1,42 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Please use recursion to define and test a function to calculate the value of 𝑥 to the power of `n`.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def power_Recur(x,n):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+import sys
+sys.setrecursionlimit(10000)
+
+def power_Recur(x,n):
+    # implementation here
+    if n == 0:
+        return 1
+    else:
+        return x * power_Recur(x, n-1)
+
+# test here
+def test_power_Recur():
+    input_list = [
+        (0, 0), 
+        (0, 3), 
+        (3, 0), 
+        (2, 3), 
+        (-2, 3), 
+        (-2, 4), 
+        (10, 10),
+        (10, 99),
+    ]
+    for x, n in input_list:
+        result = power_Recur(x, n)
+        print("x:",x,"n:",n, " result : ", result, ",len of answer", len(str(result)))
+
+
+test_power_Recur()

CDS2003_assignment02/src/P05.py

@@ -0,0 +1,30 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Please use recursion to define and test a function to accept a decimal integer and display its binary equivalent.
+  
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def Dec2Binary_Recur(num):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+def Dec2Binary_Recur(num):
+    # implementation here
+    if num > 1:
+        return Dec2Binary_Recur(num // 2) + str(num % 2)
+    else:
+        return str(num % 2)
+
+# test here
+def test_Dec2Binary_Recur():
+    num_list = [ 1,32,64,128,255]
+    for num in num_list:
+        temp = Dec2Binary_Recur(num)
+        print('result of DEC', str(num).zfill(4), ' is :',(8 - len(temp))*'0'+temp)
+
+if __name__ == '__main__':
+    test_Dec2Binary_Recur()

CDS2003_assignment02/src/P06.py

@@ -0,0 +1,43 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Please use recursion to define and test a function to take in a string and returns a reversed copy of the string.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def reverse_Recur(a,b):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+def reverse_Recur(a, b):
+    # implementation here
+    if len(a) == 0:
+        return b
+    else:
+        return reverse_Recur(a[1:], a[0] + b)
+
+# test here
+test = ''''''
+print("test string:")
+print(test)
+print("reversed:")
+print(reverse_Recur(test, ""))
+print()
+print()
+
+test = '''helloworld'''
+print("test string:")
+print(test)
+print("reversed:")
+print(reverse_Recur(test, ""))
+print()
+print()
+
+test = '''The exponent is usually shown as a superscript to the right of the base. In that case, bn is called "b raised to the nth power", "b (raised) to the power of n", "the nth power of b", "b to the nth power",[2] or most briefly as "b to the n(th)".'''
+print("test string:")
+print(test)
+print("reversed:")
+print(reverse_Recur(test, ""))

CDS2003_assignment02/src/P07.py

@@ -0,0 +1,43 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Please use recursion to define and test a function to check whether a number is Prime or not.
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+- write your code in `def isPrime_Recur(a,b):` , with comment `# implementation here`
+- write a sample function to use it, with comment `# test here`
+'''
+
+import sys
+sys.setrecursionlimit(999999)
+
+
+def isPrime_Recur(a,b):
+    # implementation here
+
+    # https://t5k.org/notes/faq/negative_primes.html
+    if a < 0:
+        return "tested number should be greater than 1"
+
+    # https://corp.tutorocean.com/is-1-a-prime-number/
+    if a == 0 or a == 1:
+        return "Conservative result: tested number is neither prime nor composite"
+
+    if b == 1:
+        return True
+
+    if a % b == 0:
+        return False
+    else:
+        return isPrime_Recur(a,b-1)
+
+# test here
+if __name__ == '__main__':
+    num_list = [-99, -3, -1, 0, 1, 3, 7, 9, 9999, 10007]
+    for num in num_list:
+        print('is ', num, ' Prime?', isPrime_Recur(num, num-1))
+    

CDS2003_assignment02/src/moodle.md

@@ -0,0 +1,20 @@
+P01
+https://leetcode.com/playground/gZTt9LMe
+
+P02
+https://leetcode.com/playground/CsnfvkZe
+
+P03
+https://leetcode.com/playground/Ga3kggri
+
+P04
+https://leetcode.com/playground/R6Xh2hnB
+
+P05
+https://leetcode.com/playground/8DPfAMSb
+
+P06
+https://leetcode.com/playground/CsnfvkZe
+
+P07
+https://leetcode.com/playground/H9BecSM9

CDS2003_assignment02/src/result.md

@@ -0,0 +1,49 @@
+assignment02_Q01_4086741
+Q01:
+Please use recursion to define and test a function to calculate the sum of a list of numbers.
+
+A01:
+
+---
+
+assignment02_Q02_4086741
+Q02:
+
+A02:
+
+---
+
+assignment02_Q03_4086741
+Q03:
+
+A03:
+
+---
+
+assignment02_Q04_4086741
+Q04:
+
+A04:
+
+---
+
+assignment02_Q05_4086741
+Q05:
+
+A05:
+
+---
+
+assignment02_Q06_4086741
+Q06:
+
+A06:
+
+---
+
+assignment02_Q07_4086741
+Q07:
+
+A07:
+
+---

CDS2003_assignment02/src/warmup/Q1.py

@@ -0,0 +1,26 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Count down a nonnegative number to zero
+  n,n— 1, n — 2, ...,0
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+'''
+
+
+def countdown(n):
+    """
+    Count down a nonnegative number to zero
+    """
+    if n == 0:
+        print(n)
+    else:
+        print(n)
+        countdown(n-1)
+
+if __name__ == '__main__':
+    countdown(5)

CDS2003_assignment02/src/warmup/Q2.py

@@ -0,0 +1,22 @@
+'''
+Draft a python script to solve the following questions. thanks
+
+# Requirement
+Calculate the factorial Of a nonnegative integer where 
+n! = n * (n - 1) * (n - 2) * ... * 2 * 1 and 0 != 1
+
+# procedure
+- let's think it step by step
+- leave me comment with your code
+- solve with recursion
+'''
+
+def factorial(n):
+    """
+    Calculate the factorial Of a nonnegative integer where 
+    n! = n * (n - 1) * (n - 2) * ... * 2 * 1 and 0 != 1
+    """
+    if n == 0 or n == 1:
+        return 1
+    else:
+        return n * factorial(n-1)

Quotation12/notes.md

@@ -0,0 +1,4 @@
+# NOTES
+
+### quote 
+HKD450

T04/quotation.md

@@ -0,0 +1 @@
+HKD200

T04/test.py

@@ -0,0 +1,11 @@
+
+
+def genGreetingLetter(customer_name, title, your_name):
+
+  greeting_letter_template = '''
+Dear {Title} {Customer_Name},
+    Merry Christmas and Happy New Year!
+Best,
+{Your_Name}
+'''.strip().replace('{Customer_Name}', customer_name).replace('{Title}', title).replace('{Your_Name}', your_name)
+  return greeting_letter_template

T04/test_2_5.py

@@ -0,0 +1,27 @@
+rate1 = 10.0
+threshold1 = 100
+discount1 = 0.1
+
+rate2 = 11.0
+threshold2 = 200
+discount2 = 0.3
+
+def compute_cost_discount(quantity, rate, threshold, discount):
+    cost = rate * quantity
+    if quantity>=threshold:
+        cost = cost*(1.0-discount)
+    return cost
+
+
+customer = input('Enter customer name: ')
+quantity = int(input('Enter order quantity: '))
+
+cost1 = compute_cost_discount(quantity, rate1, threshold1, discount1)
+cost2 = compute_cost_discount(quantity, rate2, threshold2, discount2)
+
+lowest_cost = cost1
+
+if cost2<lowest_cost:
+    lowest_cost = cost2
+
+print('Lowest Cost for', customer, ':', lowest_cost)

T04/test_2_6.py

@@ -0,0 +1,19 @@
+def computepay(hours, rate):
+  output = 0
+  hours = int(hours)
+  rate = float(rate)
+
+  if (hours > 40):
+    output = 40*rate + (hours-40)*rate*1.5
+  else:
+    output = hours*rate
+
+  return output
+
+print('Input:')
+hours = input('Enter Hours: ')
+rate = input('Enter Rate: ')
+
+pay = computepay(hours, rate)
+print('Output:')
+print(f"Pay: {pay}")

T04/test_3_1.py

@@ -0,0 +1,7 @@
+import math
+
+math.pi = 123321
+pi = math.pi
+d = math.sqrt(2)
+
+print(pi * d)

T05/2a.drawio

@@ -0,0 +1,45 @@
+<mxfile host="65bd71144e">
+    <diagram id="x3mvl7MIxiUfgaiuTItL" name="Page-1">
+        <mxGraphModel dx="533" dy="574" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="0" pageScale="1" pageWidth="827" pageHeight="1169" background="#ffffff" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="4" style="edgeStyle=none;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;strokeColor=#1A1A1A;" parent="1" source="2" target="3" edge="1">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="2" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot; style=&quot;font-size: 12px;&quot;&gt;initialize&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot; style=&quot;&quot; size=&quot;3&quot;&gt;sales = [100, 200, 100, 200, 300, 400]&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" parent="1" vertex="1">
+                    <mxGeometry x="281" y="120" width="288" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="6" value="True" style="edgeStyle=none;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fontFamily=Helvetica;fontSize=12;strokeColor=#1A1A1A;labelBackgroundColor=none;fontColor=#1A1A1A;" parent="1" source="3" target="5" edge="1">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="9" value="&lt;font&gt;False&lt;/font&gt;" style="edgeStyle=none;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;fontFamily=Helvetica;fontSize=12;strokeColor=#1A1A1A;fontColor=#1A1A1A;labelBackgroundColor=none;" parent="1" source="3" target="8" edge="1">
+                    <mxGeometry x="-0.1748" y="-10" relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="209" y="300"/>
+                        </Array>
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="3" value="sales[i] &amp;gt;= 0 ?" style="rhombus;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" parent="1" vertex="1">
+                    <mxGeometry x="363" y="260" width="125" height="80" as="geometry"/>
+                </mxCell>
+                <mxCell id="7" style="edgeStyle=none;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;fontFamily=Helvetica;fontSize=12;entryX=1;entryY=0.5;entryDx=0;entryDy=0;strokeColor=#1A1A1A;" parent="1" source="5" target="3" edge="1">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="710" y="450.28571428571445" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="670" y="450"/>
+                            <mxPoint x="670" y="300"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
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T05/2b.drawio

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T05/3a.drawio

@@ -0,0 +1,73 @@
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T05/3b.drawio

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+                <mxCell id="45" value="True" style="edgeStyle=none;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0.75;entryY=0;entryDx=0;entryDy=0;strokeColor=#1A1A1A;labelBackgroundColor=none;fontColor=#1A1A1A;" edge="1" parent="1" source="33" target="37">
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+                        <Array as="points">
+                            <mxPoint x="580" y="-260"/>
+                            <mxPoint x="580" y="170"/>
+                            <mxPoint x="456" y="170"/>
+                        </Array>
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="33" value="end of list" style="rhombus;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="363" y="-300" width="125" height="80" as="geometry"/>
+                </mxCell>
+                <mxCell id="40" value="" style="edgeStyle=none;html=1;strokeColor=#1A1A1A;" edge="1" parent="1" source="34" target="35">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="34" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;inventory = inventory - sales[i]&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="326" y="-160" width="198" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="38" value="True" style="edgeStyle=none;html=1;strokeColor=#1A1A1A;fontColor=#1A1A1A;labelBackgroundColor=none;" edge="1" parent="1" source="35" target="36">
+                    <mxGeometry x="0.2" y="14" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="44" value="False" style="edgeStyle=none;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=0;entryY=0.5;entryDx=0;entryDy=0;strokeColor=#1A1A1A;labelBackgroundColor=none;fontColor=#1A1A1A;" edge="1" parent="1" source="35" target="10">
+                    <mxGeometry x="-0.0049" y="-20" relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="220"/>
+                            <mxPoint x="220" y="-405"/>
+                        </Array>
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="35" value="inventory &amp;lt; 0" style="rhombus;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="363" y="-40" width="125" height="80" as="geometry"/>
+                </mxCell>
+                <mxCell id="39" value="" style="edgeStyle=none;html=1;strokeColor=#1A1A1A;" edge="1" parent="1" source="36" target="37">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="36" value="print out of stock" style="rounded=0;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="363.75" y="90" width="123.5" height="50" as="geometry"/>
+                </mxCell>
+                <mxCell id="37" value="end" style="rounded=0;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="363.75" y="190" width="123.5" height="50" as="geometry"/>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

T05/3c.drawio

@@ -0,0 +1,67 @@
+<mxfile host="65bd71144e">
+    <diagram id="x3mvl7MIxiUfgaiuTItL" name="Page-1">
+        <mxGraphModel dx="1346" dy="1840" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="0" pageScale="1" pageWidth="827" pageHeight="1169" background="#ffffff" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="49" style="edgeStyle=none;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;labelBackgroundColor=none;strokeColor=#1A1A1A;fontColor=#1A1A1A;" edge="1" parent="1" source="10" target="46">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="10" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot;&gt;loop through every sale in sales list,&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot;&gt;get item &quot;sale&quot; (denoted 's')&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" parent="1" vertex="1">
+                    <mxGeometry x="281" y="-450" width="288" height="90" as="geometry"/>
+                </mxCell>
+                <mxCell id="43" value="" style="edgeStyle=none;html=1;strokeColor=#1A1A1A;" parent="1" source="32" target="10" edge="1">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="32" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot; style=&quot;font-size: 12px;&quot;&gt;initialize&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;&quot;&gt;&lt;div&gt;sales = [100, 200, None, 100, 200, 300, 400, None]&lt;/div&gt;&lt;div&gt;&lt;span style=&quot;background-color: initial;&quot;&gt;inventory = 1000&lt;/span&gt;&lt;br&gt;&lt;/div&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" parent="1" vertex="1">
+                    <mxGeometry x="281" y="-600" width="288" height="90" as="geometry"/>
+                </mxCell>
+                <mxCell id="48" value="True" style="edgeStyle=none;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=1;entryY=0.5;entryDx=0;entryDy=0;strokeColor=#1A1A1A;labelBackgroundColor=none;fontColor=#1A1A1A;" edge="1" parent="1" source="46" target="10">
+                    <mxGeometry x="0.0172" y="20" relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="640" y="-250"/>
+                            <mxPoint x="640" y="-405"/>
+                        </Array>
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="51" value="False" style="edgeStyle=none;html=1;labelBackgroundColor=none;strokeColor=#1A1A1A;fontColor=#1A1A1A;" edge="1" parent="1" source="46" target="50">
+                    <mxGeometry y="15" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="46" value="s == None ?" style="rhombus;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="362.5" y="-290" width="125" height="80" as="geometry"/>
+                </mxCell>
+                <mxCell id="53" value="" style="edgeStyle=none;html=1;labelBackgroundColor=none;strokeColor=#1A1A1A;fontColor=#1A1A1A;" edge="1" parent="1" source="50" target="52">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="50" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot;&gt;inventory = inventory - s&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="281" y="-170" width="288" height="90" as="geometry"/>
+                </mxCell>
+                <mxCell id="55" value="False" style="edgeStyle=none;html=1;labelBackgroundColor=none;strokeColor=#1A1A1A;fontColor=#1A1A1A;" edge="1" parent="1" source="52" target="54">
+                    <mxGeometry y="15" relative="1" as="geometry">
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="58" value="True" style="edgeStyle=none;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;entryX=0.5;entryY=0;entryDx=0;entryDy=0;labelBackgroundColor=none;strokeColor=#1A1A1A;fontColor=#1A1A1A;" edge="1" parent="1" source="52" target="56">
+                    <mxGeometry x="-0.2537" y="10" relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="575"/>
+                        </Array>
+                        <mxPoint as="offset"/>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="52" value="inventory &amp;lt; 0 ?" style="rhombus;whiteSpace=wrap;html=1;strokeColor=#1A1A1A;fillColor=#E6E6E6;fontColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="362.5" y="-40" width="125" height="80" as="geometry"/>
+                </mxCell>
+                <mxCell id="54" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot;&gt;print &quot;out of stock&quot;&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" vertex="1" parent="1">
+                    <mxGeometry x="370" y="80" width="110" height="90" as="geometry"/>
+                </mxCell>
+                <mxCell id="56" value="&lt;div style=&quot;line-height: 24px;&quot;&gt;&lt;div style=&quot;&quot;&gt;&lt;font color=&quot;#1a1a1a&quot;&gt;end&lt;/font&gt;&lt;/div&gt;&lt;div style=&quot;background-color: rgb(30, 30, 30); font-size: 18px; font-family: &amp;quot;Monaco for Powerline&amp;quot;, &amp;quot;Droid Sans Mono&amp;quot;, &amp;quot;monospace&amp;quot;, monospace, Consolas, &amp;quot;Courier New&amp;quot;, monospace;&quot;&gt;&lt;/div&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;fillColor=#E6E6E6;fontColor=#050505;strokeColor=#1A1A1A;" vertex="1" parent="1">
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+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

T05/CDS1001T5Report_original.ipynb

@@ -0,0 +1,914 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# CDS1001 Tutorial 5 Report"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### Input your name and student ID in the cell below (<font color='red'>if a cell is not in edit mode, double click it</font>):"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<div class=\"alert alert-info\">\n",
+    "    \n",
+    "Your name: \n",
+    "\n",
+    "Your student ID:\n",
+    "    \n",
+    "</div>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### Objectives:\n",
+    "- Understand why loops are used in coding\n",
+    "- Be able to understand and use while loop and for loop\n",
+    "- Be able to understand and apply the basic pattens of loops\n",
+    "- Be able to understand and draw flow charts for loops\n",
+    "- Be able to use print() in debugging"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### **Instructions for the report**:\n",
+    "* Follow Section 1 and Section 2 of the tutorial instruction to launch Python IDLE through Anaconda Navigation.\n",
+    "* Refer to Section 2.2 of the tutorial instruction to open tutorial 5 report\n",
+    "* Complete Parts 1-5 led by the lecturer\n",
+    "* Complete Part 6 independently\n",
+    "* Follow Section 3 of the tutorial instruction to save the report and zip the report folder. The zip file is named as CDS1001T5Report{your student_id}.zip (e.g., if student_id is 1234567, then the zip file's name is CDS1001T5Report1234567.zip). <font color='red'>The zip file needs to include the following files:\n",
+    "    - an .ipynb file of this tutorial report    \n",
+    "    - image files of flowcharts or screenshots used in this tutorial report </font>       \n",
+    "* Submit the zip file of the report folder to the Moodle. The submission due date is **<font color='red'>24 Oct 2023 11:55 PM</font>**"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 1 Loop"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 1.1. Read and execute the following code, and answer the questions below:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Enter the city you are from: Hong Kong\n",
+      "Enter the city you are from: Shanghai\n",
+      "Enter the city you are from: Tokyo\n",
+      "Enter the city you are from: Hong Kong\n",
+      "Enter the city you are from: end\n",
+      "Number of guests from Hong Kong: 2\n"
+     ]
+    }
+   ],
+   "source": [
+    "number_hk = 0\n",
+    "flag_end = False\n",
+    "while not flag_end:\n",
+    "    city = input('Enter the city that the guest comes from: ')\n",
+    "    if city == 'Hong Kong':\n",
+    "        number_hk = number_hk +1\n",
+    "    elif city == 'End' or city == 'end':\n",
+    "        flag_end = True\n",
+    "print('Number of guests from Hong Kong:', number_hk)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 1.1.1: What is the body of the loop used in the code above? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Answer:\n",
+    "\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 1.1.2: What's the condition for the loop to stop? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 1.1.3: What does the loop of the above code do? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 1.1.4: Is it possible to rewrite the code above without using loops but using repeated codes? Explain your reasons. (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 2 while Loop"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 2.1. Execute the codes below,  explain how the codes are executed, and draw the flowcharts. (4 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Inventory left: -300\n"
+     ]
+    }
+   ],
+   "source": [
+    "sales = [100, 200, 100, 200, 300, 400, -1]\n",
+    "i = 0\n",
+    "inventory = 1000\n",
+    "while sales[i]>=0: #sales[i] indicates the (i+1)-th item of the sequence sales\n",
+    "    inventory = inventory - sales[i]\n",
+    "    i = i + 1\n",
+    "print('Inventory left:', inventory)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how the above code is executed </font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to insert a figure of the flowchart of the code above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (b)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Out of stock!\n"
+     ]
+    }
+   ],
+   "source": [
+    "sales = [100, 200, 100, 200, 300, 400, -1]\n",
+    "i = 0\n",
+    "inventory = 1000\n",
+    "while sales[i]>=0: #sales[i] indicates the (i+1)-th item of the sequence sales\n",
+    "    inventory = inventory - sales[i]\n",
+    "    if inventory < 0:\n",
+    "        break\n",
+    "    i = i + 1\n",
+    "if inventory >= 0:\n",
+    "    print('Inventory left:', inventory)\n",
+    "else:\n",
+    "    print('Out of stock!')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how the above code is executed </font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to insert a figure of the flowchart of the code above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 2.2. Execute the code below, explain the errors received, and discuss how to fix the errors (4 points):"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "IndentationError",
+     "evalue": "expected an indented block (<ipython-input-12-a14b33f59865>, line 4)",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;36m  File \u001b[0;32m\"<ipython-input-12-a14b33f59865>\"\u001b[0;36m, line \u001b[0;32m4\u001b[0m\n\u001b[0;31m    total = total + i\u001b[0m\n\u001b[0m    ^\u001b[0m\n\u001b[0;31mIndentationError\u001b[0m\u001b[0;31m:\u001b[0m expected an indented block\n"
+     ]
+    }
+   ],
+   "source": [
+    "total = 0\n",
+    "i = 1\n",
+    "while i<=100:\n",
+    "total = total + i\n",
+    "i = i + 1\n",
+    "print(total)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain what are the errors and how to fix them </font>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#Edit this cell to write the correct code:\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (b)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
+    {
+     "ename": "SyntaxError",
+     "evalue": "invalid syntax (<ipython-input-6-4110f0b7133b>, line 4)",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-6-4110f0b7133b>\"\u001b[1;36m, line \u001b[1;32m4\u001b[0m\n\u001b[1;33m    while flag=0:\u001b[0m\n\u001b[1;37m              ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
+     ]
+    }
+   ],
+   "source": [
+    "total = 0\n",
+    "flag = 0\n",
+    "i = 1\n",
+    "while flag=0:\n",
+    "    total = total + i\n",
+    "    i = i + 1\n",
+    "    if i > 100:\n",
+    "        flag = 1\n",
+    "print(total)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain what are the errors and how to fix them </font>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#Edit this cell to write the correct code:\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 2.3. Write a code for the flow chart below using a while loop, and explain the code: (4 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src = \"flow0.png\" width=\"400\">"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#edit this cell to write the code for the flowchart above"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain what the above code does:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 3 for Loop"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 3.1. Execute the codes below, explain how the codes are executed, and draw the flowcharts: (6 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (a)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Inventory left: -300\n"
+     ]
+    }
+   ],
+   "source": [
+    "sales = [100, 200, 100, 200, 300, 400]\n",
+    "inventory = 1000\n",
+    "for s in sales:\n",
+    "    inventory = inventory - s    \n",
+    "print('Inventory left:', inventory)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how the above code is executed </font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to insert a figure of the flowchart of the code above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (b)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Out of stock!\n"
+     ]
+    }
+   ],
+   "source": [
+    "sales = [100, 200, 100, 200, 300, 400]\n",
+    "inventory = 1000\n",
+    "for s in sales:\n",
+    "    inventory = inventory - s\n",
+    "    if inventory<0:\n",
+    "        print('Out of stock!')\n",
+    "        break"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how the above code is executed </font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to insert a figure of the flowchart of the code above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### (c)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Out of stock!\n"
+     ]
+    }
+   ],
+   "source": [
+    "sales = [100, 200, None, 100, 200, 300, 400, None] \n",
+    "inventory = 1000\n",
+    "for s in sales:\n",
+    "    if s == None:\n",
+    "        continue\n",
+    "    inventory = inventory - s\n",
+    "    if inventory<0:\n",
+    "        print('Out of stock!')\n",
+    "        break"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how the above code is executed </font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to insert a figure of the flowchart of the code above</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 3.2. Write a code for the flow chart below, using for loop, and explain the code. (4 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<img src = \"flow1.png\" width=\"400\">"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#edit this cell to write the code for the flowchart above"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain what the above code does:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 4 Loop Patterns"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 4.1. Vote\n",
+    "Your department has a poll on the location to celebrate the new year, among three candidates, including 'Hong Kong Disney Land Hotel', \"Hotel ICON', and \"Hong Kong Ocean Park Marriott Hotel\". Please write a program to enter each colleague's choice, and output the poll result.\n",
+    "\n",
+    "Sample Input/Output\n",
+    "\n",
+    "    Enter Your Choice (0-Exit Poll, 1-Disney, 2-Hotel ICON, 3-Ocean Park): 1\n",
+    "    Enter Your Choice (0-Exit Poll, 1-Disney, 2-Hotel ICON, 3-Ocean Park): 2\n",
+    "    Enter Your Choice (0-Exit Poll, 1-Disney, 2-Hotel ICON, 3-Ocean Park): 2\n",
+    "    Enter Your Choice (0-Exit Poll, 1-Disney, 2-Hotel ICON, 3-Ocean Park): 3\n",
+    "    Enter Your Choice (0-Exit Poll, 1-Disney, 2-Hotel ICON, 3-Ocean Park): 0\n",
+    "    \n",
+    "    Disney: 1\n",
+    "    Hotel ICON: 2\n",
+    "    Ocean Park: 1"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 4.1.1: How are you going to define variables to store votes for three different candidate locations? What are their names and types? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 4.1.2: Are you going to use a while loop or a for loop to write the code? Why and how?(2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 4.1.3: Write codes. (6 points)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#edit this cell to write the program"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 4.1.4: Are there any other ways to write the code? For example, is it possible to use an infinite loop with break, or use a flag variable, etc? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#edit this cell to show other possible ways to write the code"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 5 Debugging"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 5.1. Execute the code below, and use the information printed to identify the error and fix it"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "max of data is: 5\n",
+      "sum of data is: 21\n",
+      "min of data is: 1\n"
+     ]
+    }
+   ],
+   "source": [
+    "data = [1,4,2,5,4]\n",
+    "result = 0\n",
+    "for entry in data:\n",
+    "    if entry>result:\n",
+    "        result = entry\n",
+    "print('max of data is:', result)\n",
+    "for entry in data:\n",
+    "    result = result + entry\n",
+    "print('sum of data is:', result)\n",
+    "for entry in data:\n",
+    "    if entry<result:\n",
+    "        result = entry\n",
+    "print('min of data is:', result)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 5.1.1. Execute the code above, and describe which output information is not correct. (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 5.1.2. From the wrong output information identified, can you tell which part of the code may have problems? (2 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "##### Question 5.1.3. Describe the problem of the code, and explain how to correct it. (4 points)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to answer the question above:</font>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#Edit this cell to write the corrected code"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>*Create a python file of the code above in Python IDLE, execute the code for a test, and paste the screenshot of the test result below in this cell:*</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "### Part 6 Other Exercises"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 6.1. Cheapest Carrier (25 points)\n",
+    "Use a while loop to write a program that prompts a logistics manager to enter shipping rates submitted by carriers until the manager enters 'quit'. The program then outputs the lowest shipping rate, and the carrier who submits the lowest shipping rate.\n",
+    "\n",
+    "Sample Input/Output\n",
+    "\n",
+    "    Enter Carrier Name: OOCL\n",
+    "    Enter Shipping Rate: 130\n",
+    "    Enter Carrier Name: MMM\n",
+    "    Enter Shipping Rate: 100\n",
+    "    Enter Carrier Name: NNN\n",
+    "    Enter Shipping Rate: 110\n",
+    "    Enter Carrier Name: quit\n",
+    "    \n",
+    "    The lowest shipping rate is 100, submitted by MMM."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#edit this cell to write your code\n",
+    "#Hint: (1) define variables to store the lowest shipping rate, and the carrier who submits the lowest shipping rate. \n",
+    "#      (2) update these variables in each iteration"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Execute and test your revised code above for various inputs. Edit this cell to copy your test results below:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how you use iterations to write the code:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "#### 6.2. Sales Forecast (25 points)\n",
+    "\n",
+    "Given the actual sales in the past year as follows, a sales manager predicts sales for the new year in the following way:\n",
+    "\n",
+    "For the i-th month of the new year, its forecasted sales = the actual sales of the i-th month of the past year * 1.2 if i is not 6 or 7; otherwise, its forecasted sales = the actual sales of the i-th month of the past year * 1.3\n",
+    "\n",
+    "Use a for loop to revise the code below, so as to output the sales forecast for the 12 months of the new year"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Actual Sales of month 1 in the past year: 100\n",
+      "Actual Sales of month 2 in the past year: 120\n",
+      "Actual Sales of month 3 in the past year: 100\n",
+      "Actual Sales of month 4 in the past year: 120\n",
+      "Actual Sales of month 5 in the past year: 140\n",
+      "Actual Sales of month 6 in the past year: 130\n",
+      "Actual Sales of month 7 in the past year: 120\n",
+      "Actual Sales of month 8 in the past year: 150\n",
+      "Actual Sales of month 9 in the past year: 150\n",
+      "Actual Sales of month 10 in the past year: 110\n",
+      "Actual Sales of month 11 in the past year: 120\n",
+      "Actual Sales of month 12 in the past year: 100\n"
+     ]
+    }
+   ],
+   "source": [
+    "#the actual sales of the 12 months of the past year are stored in the list actual_sales_past:\n",
+    "actual_sales_past = [100,120,100,120,140,130,120,150,150,110,120,100]\n",
+    "#the actual sales of the i-th month of the past year is stored in actual_sales_past[i-1] for i =1,2,...,12\n",
+    "#the for loop below is to print the actual sales for the 12 months of the past years:\n",
+    "for i in [1,2,3,4,5,6,7,8,9,10,11,12]:\n",
+    "    print('Actual Sales of month', i, 'in the past year:', actual_sales_past[i-1])\n",
+    "\n",
+    "#Based on the code above and the rule mentioned in the problem description, \n",
+    "#write a new code below to compute and output the sales forcast for the 12 months of the new year: \n",
+    "\n",
+    "#Hints:(1) use a for loop to iteratate data entry in actual_sales_past; \n",
+    "#      (2) use a variable i to indicate the month id to be processed in the iteartion;\n",
+    "#      (3) compute the forecasted sales for month i based on the actual sales of the i-th month of the past year, \n",
+    "#          which is stored in actual_sales_past[i-1] for i = 1,2,...,12\n",
+    "#      (4) print the forecasted sales for month i\n",
+    "#      (5) update variable i"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Execute and test your revised code above for various inputs. Edit this cell to copy your test results below:</font>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<font color='red'>Edit this cell to explain how you use iterations to write the code:</font>"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.7"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}

T05/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "t05",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "gitUpdate":"git add . && git commit -m\"update max015\""
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC"
+}

T06/Question 3.1.3.drawio

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+                <mxCell id="11" value="close the output_file handler" style="whiteSpace=wrap;html=1;fontSize=18;" parent="1" vertex="1">
+                    <mxGeometry x="160" y="820" width="280" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="13" value="close the input_file handler" style="whiteSpace=wrap;html=1;fontSize=18;" parent="1" vertex="1">
+                    <mxGeometry x="160" y="930" width="280" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="20" value="" style="edgeStyle=none;html=1;fontColor=#000000;" edge="1" parent="1" source="14" target="11">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="22" style="edgeStyle=none;html=1;exitX=1;exitY=0.5;exitDx=0;exitDy=0;fontColor=#000000;" edge="1" parent="1" source="14">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="300" y="280" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="560" y="740"/>
+                            <mxPoint x="560" y="280"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="14" value="reach the &lt;br&gt;end of file ?" style="rhombus;whiteSpace=wrap;html=1;fontSize=18;" parent="1" vertex="1">
+                    <mxGeometry x="192.5" y="700" width="215" height="80" as="geometry"/>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

T06/T06/4_1_6.py

@@ -0,0 +1,25 @@
+#edit this cell to write the program
+
+votes_file = open ('./report/votes.txt', 'r')
+results_file = open ('./report/results.txt', 'w')
+disney_vote = 0
+hotel_icon_vote = 0
+ocean_park_vote = 0
+
+for s in votes_file:    
+  if s.strip() == 'Disney':
+    disney_vote = disney_vote + 1
+  if s.strip() == 'Hotel ICON' :
+    hotel_icon_vote = hotel_icon_vote + 1
+  if s.strip() == 'Ocean Park':
+    ocean_park_vote = ocean_park_vote + 1
+
+disney_output = 'Disney:%s\n' % disney_vote
+hotel_icon_output = 'Hotel ICON:%s\n' % hotel_icon_vote
+ocean_park_output = 'Ocean Park:%s\n' % ocean_park_vote
+output = disney_output + hotel_icon_output + ocean_park_output
+
+results_file.write(output.strip())
+
+results_file.close()
+votes_file.close()

T06/T06/5_1_5.py

@@ -0,0 +1,24 @@
+#edit this cell to write your code
+#Hint: (1) input the name of the input file
+#      (2) define a file handle for the input file
+#      (3) for each line of the file, extract the carrier id and shipping rate by using string's find function 
+#          and slice operation, and then update the variables that store the lowest shipping rate and its carrier id
+
+lowest_rate = -1
+lowest_rate_carrier = ""
+
+file_name = input("please enter a file name: ")
+
+with open(file_name, 'r') as carrier_file:
+  for s in carrier_file:    
+    if s != "-1":
+      p = s.find(' ')
+      rate = float(s[p+1:])
+      carrier = s[0:p]
+      if ( rate < lowest_rate or lowest_rate == -1):
+        lowest_rate_carrier = carrier
+        lowest_rate = rate
+
+output = 'The lowest shipping rate is %s, ' % lowest_rate
+output1 = 'submitted by %s.' % lowest_rate_carrier
+print(output+ output1)

T06/T06/new_requests.txt

@@ -0,0 +1,3 @@
+APPLE 100
+APPLE 120
+APPLE 130

T06/T06/report/carrier.txt

@@ -0,0 +1,7 @@
+OOCL 130
+MMM 100
+NNN 110
+OOO 99
+PPP 80
+RRR 111
+-1

T06/T06/report/results.txt

@@ -0,0 +1,3 @@
+Disney:3
+Hotel ICON:4
+Ocean Park:3

T06/T06/report/votes.txt

@@ -0,0 +1,11 @@
+Disney
+Hotel ICON
+Hotel ICON
+Ocean Park
+Disney
+Hotel ICON
+Ocean Park
+Disney
+Ocean Park
+Hotel ICON
+-1

T06/T06/requests.txt

@@ -0,0 +1,6 @@
+APPLE 100
+ORANGE 90
+BANANA 95
+APPLE 120
+APPLE 130
+BANANA 2	5

T07/deliver/letter-000001.txt

@@ -0,0 +1,6 @@
+Dear John Lee,
+Thank you for purchasing Laster Printer X50. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/deliver/letter-000002.txt

@@ -0,0 +1,6 @@
+Dear Eric Chan,
+Thank you for purchasing Laster Printer X51. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/deliver/letter-000003.txt

@@ -0,0 +1,6 @@
+Dear Paul Chan,
+Thank you for purchasing LED Monitor M310. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/deliver/sales.txt

@@ -0,0 +1,4 @@
+000001, John Lee, Laster Printer X50
+000002, Eric Chan, Laster Printer X51
+000003, Paul Chan, LED Monitor M310
+-1

T07/deliver/test.py

@@ -0,0 +1,18 @@
+#edit this cell to write the program
+
+hotel = []
+
+with open("./votes.txt",'r') as fi:
+  lines = fi.readlines()
+  for l in lines:
+    l2 = l.strip()
+    hotel.extend(l2.split(', '))
+
+
+print("Disney: " + str(hotel.count("Disney")))
+print("Hotel ICON: " + str(hotel.count("Hotel ICON")))
+print("Ocean Park: " + str(hotel.count("Ocean Park")))
+
+
+
+print("helloworld")

T07/deliver/votes.txt

@@ -0,0 +1,13 @@
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+-1

T07/letter-000001.txt

@@ -0,0 +1,6 @@
+Dear John Lee,
+Thank you for purchasing Laster Printer X50. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/letter-000002.txt

@@ -0,0 +1,6 @@
+Dear Eric Chan,
+Thank you for purchasing Laster Printer X51. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/letter-000003.txt

@@ -0,0 +1,6 @@
+Dear Paul Chan,
+Thank you for purchasing LED Monitor M310. 
+Wish you Merry Christmas and Happy New year!
+
+Regards,
+Company LU

T07/sales.txt

@@ -0,0 +1,4 @@
+000001, John Lee, Laster Printer X50
+000002, Eric Chan, Laster Printer X51
+000003, Paul Chan, LED Monitor M310
+-1

T07/test.py

@@ -0,0 +1,18 @@
+#edit this cell to write the program
+
+hotel = []
+
+with open("./votes.txt",'r') as fi:
+  lines = fi.readlines()
+  for l in lines:
+    l2 = l.strip()
+    hotel.extend(l2.split(', '))
+
+
+print("Disney: " + str(hotel.count("Disney")))
+print("Hotel ICON: " + str(hotel.count("Hotel ICON")))
+print("Ocean Park: " + str(hotel.count("Ocean Park")))
+
+
+
+print("helloworld")

T07/votes.txt

@@ -0,0 +1,13 @@
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+Disney, Ocean Park
+Hotel ICON, Ocean Park
+Hotel ICON
+Ocean Park
+-1

T08/Q2_4.drawio

@@ -0,0 +1,76 @@
+<mxfile host="65bd71144e">
+    <diagram id="gbafj2K8NTiN-hHC4odU" name="Page-1">
+        <mxGraphModel dx="812" dy="945" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="11" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="2" target="3">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="2" value="Iterate every character" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="200" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="9" value="No" style="edgeStyle=none;html=1;" edge="1" parent="1" source="3" target="8">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="10" value="Yes" style="edgeStyle=none;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="3" target="7">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="520" y="400"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="3" value="Found match&lt;br&gt;in the dictionary ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="320" width="160" height="160" as="geometry"/>
+                </mxCell>
+                <mxCell id="15" style="edgeStyle=none;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="7" target="12">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="520" y="610"/>
+                            <mxPoint x="280" y="610"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="7" value="increase character count" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="440" y="520" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="14" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="8" target="12">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="8" value="initialize character count = 1" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="520" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="13" value="No" style="edgeStyle=none;html=1;" edge="1" parent="1" source="12">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="280" y="300" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="120" y="720"/>
+                            <mxPoint x="120" y="300"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="17" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="12" target="16">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="12" value="end of string ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="640" width="160" height="160" as="geometry"/>
+                </mxCell>
+                <mxCell id="22" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="16" target="19">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="16" value="Print output" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="850" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="20" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="18" target="2">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="18" value="Start" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="220" y="100" width="120" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="19" value="End" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="220" y="960" width="120" height="60" as="geometry"/>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

T08/deliver/Q2_4.drawio

@@ -0,0 +1,76 @@
+<mxfile host="65bd71144e">
+    <diagram id="gbafj2K8NTiN-hHC4odU" name="Page-1">
+        <mxGraphModel dx="812" dy="945" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+                <mxCell id="11" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="2" target="3">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="2" value="Iterate every character" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="200" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="9" value="No" style="edgeStyle=none;html=1;" edge="1" parent="1" source="3" target="8">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="10" value="Yes" style="edgeStyle=none;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="3" target="7">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="520" y="400"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="3" value="Found match&lt;br&gt;in the dictionary ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="320" width="160" height="160" as="geometry"/>
+                </mxCell>
+                <mxCell id="15" style="edgeStyle=none;html=1;entryX=0.5;entryY=0;entryDx=0;entryDy=0;" edge="1" parent="1" source="7" target="12">
+                    <mxGeometry relative="1" as="geometry">
+                        <Array as="points">
+                            <mxPoint x="520" y="610"/>
+                            <mxPoint x="280" y="610"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="7" value="increase character count" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="440" y="520" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="14" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="8" target="12">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="8" value="initialize character count = 1" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="520" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="13" value="No" style="edgeStyle=none;html=1;" edge="1" parent="1" source="12">
+                    <mxGeometry relative="1" as="geometry">
+                        <mxPoint x="280" y="300" as="targetPoint"/>
+                        <Array as="points">
+                            <mxPoint x="120" y="720"/>
+                            <mxPoint x="120" y="300"/>
+                        </Array>
+                    </mxGeometry>
+                </mxCell>
+                <mxCell id="17" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="12" target="16">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="12" value="end of string ?" style="rhombus;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="640" width="160" height="160" as="geometry"/>
+                </mxCell>
+                <mxCell id="22" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="16" target="19">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="16" value="Print output" style="rounded=0;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="200" y="850" width="160" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="20" value="" style="edgeStyle=none;html=1;" edge="1" parent="1" source="18" target="2">
+                    <mxGeometry relative="1" as="geometry"/>
+                </mxCell>
+                <mxCell id="18" value="Start" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="220" y="100" width="120" height="60" as="geometry"/>
+                </mxCell>
+                <mxCell id="19" value="End" style="rounded=1;whiteSpace=wrap;html=1;" vertex="1" parent="1">
+                    <mxGeometry x="220" y="960" width="120" height="60" as="geometry"/>
+                </mxCell>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

T08/deliver/input-7-1.txt

@@ -0,0 +1,5 @@
+HK RD 2030.0 MMMM
+HK SF 2000.0 OOCL
+HK SF 2020.0 MMMM
+HK RD 2025.0 OOCL
+-1

T08/deliver/input-7-2.txt

@@ -0,0 +1,5 @@
+HK RD 5030.0 MMMM
+HK SF 5000.0 OOCL
+HK SF 6020.0 MMMM
+HK RD 6025.0 OOCL
+-1

T08/deliver/lowest.py

@@ -0,0 +1,22 @@
+files = ['./input-7-1.txt', './input-7-2.txt']
+
+for f in files:
+  with open(f,'r') as fi:
+    lowest_rate = {}
+
+    lines = fi.readlines()
+    for l in lines:
+      if (l != '-1'):
+        [origin_port, destination_port, shipping_rate, carrier_name] = l.strip().split(' ')
+        shipping_rate = float(shipping_rate)
+
+        if (destination_port in lowest_rate.keys()):
+          if shipping_rate < lowest_rate[destination_port]['shipping_rate'] :
+            lowest_rate[destination_port] = {'origin_port': origin_port, 'destination_port': destination_port, 'shipping_rate': shipping_rate, 'carrier_name': carrier_name}
+        else:
+          lowest_rate[destination_port] = {'origin_port': origin_port, 'destination_port': destination_port, 'shipping_rate': shipping_rate, 'carrier_name': carrier_name}
+
+  print(f)
+  for v in lowest_rate.values():
+    print(f"The lowest shipping rate from {v['origin_port']}' to {v['destination_port']} is {v['shipping_rate']}.")
+  print()

T08/input-7-1.txt

@@ -0,0 +1,5 @@
+HK RD 2030.0 MMMM
+HK SF 2000.0 OOCL
+HK SF 2020.0 MMMM
+HK RD 2025.0 OOCL
+-1

T08/input-7-2.txt

@@ -0,0 +1,5 @@
+HK RD 5030.0 MMMM
+HK SF 5000.0 OOCL
+HK SF 6020.0 MMMM
+HK RD 6025.0 OOCL
+-1