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
Cinema Seating Optimization
1.
Save your file as "ClassNumber_YourName_Ex01.py"
A cinema hall has 10 rows, each with 15 seats. For each show, fill each seat with alternating people and leave a gap every 3rd seat for spacing. (P for person, _ for empty)
You are given three variables: rows, seats_per_row.
1
6
Output Example
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _rows = 10
seats_per_row = 15Use a while loop to iterate over all the rows from 0 to rows - 1.
2
Use a nested while loop to iterate over seat numbers from 0 to seats_per_row - 1.
3
For each seat, print 'P' to row unless the seat index is a multiple of 3 (starting from 0), in which case print '_'. After filling a row.
4
Within each printed row, print the seat characters with a space in between.
5
print( "P ", end="" )Python Nested Loops - Ex01
Cinema Seating Optimization
1.
Save your file as "ClassNumber_YourName_Ex01.py"
A cinema hall has 10 rows, each with 15 seats. For each show, fill each seat with alternating people and leave a gap every 3rd seat for spacing. (P for person, _ for empty)
You are given three variables: rows, seats_per_row.
1
6
Output Example
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _
P P _ P P _ P P _ P P _ P P _rows = 10
seats_per_row = 15Use a while loop to iterate over all the rows from 0 to rows - 1.
2
Use a nested while loop to iterate over seat numbers from 0 to seats_per_row - 1.
3
For each seat, print 'P' to row unless the seat index is a multiple of 3 (starting from 0), in which case print '_'. After filling a row.
4
Within each printed row, print the seat characters with a space in between.
5
print( "P ", end="" )Python Nested Loops - Ex02
Catching a Hit-and-Run Driver
1.
Save your file as "ClassNumber_YourName_Ex02.py"
A truck violated traffic rules and fled the scene after hitting a pedestrian. There were three eyewitnesses at the scene. Although none of them could remember the full license plate number, they each provided some useful clues:
Witness A said: “The first two digits of the license plate number are the same.”
1
Witness B said: “The last two digits of the license plate number are the same, but different from the first two digits.”
2
Witness C, a mathematician, said: “The 4-digit license plate number is a perfect square.”
3