Form 4 - Computer
2024-2025
Floor 4 - Computer Room
Mr. Peter
Nested While Loops
Santa Rosa de Lima English Secondary School
聖羅撒英文中學
Colégio de Santa Rosa de Lima - Secção Inglesa
Python Exercises
Python Nested Loops - Ex01
Password Brute-Force Simulation
1.
Save your file as "ClassNumber_YourName_Ex01.py"
Simulate a brute-force checker for a 3-character numeric password using digits 0 ~ 9; check all combinations (e.g., "000", "001", ...).
2
Use
three nested
while loops
to generate all possible
3-digit numeric passwords from
"000" to
"999".
1
Convert each password into a
byte string
(e.g., b"001") and compute its
SHA-1 hash using
hashlib.sha1().hexdigest().
import hashlib
text = "001"
sha1_hash = hashlib.sha1(text.encode('utf-8')).hexdigest()
print(sha1_hash)3
Compare each generated hash to the known hash:
7a698699a9229b278afa72593214582d739b9bad4
If a match is found, print the original
3-digit password (e.g.,
"425") and immediately stop all loops.
5
Print only the matched password on a new line, with no extra output.
Python Nested Loops - Ex01
Password Brute-Force Simulation
1.
Save your file as "ClassNumber_YourName_Ex01.py"
Simulate a brute-force checker for a 3-character numeric password using digits 0 ~ 9; check all combinations (e.g., "000", "001", ...).
2
Use
three nested
while loops
to generate all possible
3-digit numeric passwords from
"000" to
"999".
1
Convert each password into a
byte string
(e.g., b"001") and compute its
SHA-1 hash using
hashlib.sha1().hexdigest().
import hashlib
text = "001"
sha1_hash = hashlib.sha1(text.encode('utf-8')).hexdigest()
print(sha1_hash)3
Compare each generated hash to the known hash:
7a698699a9229b278afa72593214582d739b9bad4
If a match is found, print the original
3-digit password (e.g.,
"425") and immediately stop all loops.
5
Print only the matched password on a new line, with no extra output.
Python Nested Loops - Ex02
Find Triplets with Pythagorean Condition
1.
Save your file as "ClassNumber_YourName_Ex02.py"
Find all triplets
(a, b, c)
such that
a2 + b2 = c2
and
1 ≤ a, b, c ≤ 30
.
The values for a, b, and c must each range from 1 to 30, inclusive.
1
3, 4, 5
5, 12, 13
6, 8, 10
7, 24, 25
8, 15, 17
9, 12, 15
10, 24, 26
12, 16, 20
15, 20, 25
18, 24, 30
20, 21, 29
You should only print combinations where a² + b² == c².
2
Ensure the program does not repeat the same triplet in different orders, e.g., "3, 4, 5" and "4, 3, 5" should only appear once.
3
Your output should be printed as a string in the format: 1, 2, 3
4
Final Output:
5
Python Nested Loops - Ex02
Find Triplets with Pythagorean Condition
1.
Save your file as "ClassNumber_YourName_Ex02.py"
Find all triplets
(a, b, c)
such that
a2 + b2 = c2
and
1 ≤ a, b, c ≤ 30
.
The values for a, b, and c must each range from 1 to 30, inclusive.
1
3, 4, 5
5, 12, 13
6, 8, 10
7, 24, 25
8, 15, 17
9, 12, 15
10, 24, 26
12, 16, 20
15, 20, 25
18, 24, 30
20, 21, 29
You should only print combinations where a² + b² == c².
2
Ensure the program does not repeat the same triplet in different orders, e.g., "3, 4, 5" and "4, 3, 5" should only appear once.
3
Your output should be printed as a string in the format: 1, 2, 3
4
Final Output:
5