1. Seconds to (hours,minutes,seconds) conversion
Computers and Programming
Chalermsak Chatdokmaiprai
Department of Computer Engineering Kasetsart University
Revised

8. # version 1
sec = int(input('How many seconds? '))
min = sec // 60
sec = sec % 60
hr = min // 60
min = min % 60
print(f'{hr} hours, {min} minutes, {sec} seconds')

9. # version 2 – same algorithm as version 1
sec = int(input('How many seconds? '))
min,sec = sec // 60, sec % 60
hr,min = min // 60, min % 60
print(f'{hr} hours, {min} minutes, {sec} seconds')

10. Alternative Solution: Using derived mathematical formalas
(inspired by a student's solution)

12. # version 3 -- using formulas
sec = int(input('How many seconds? '))
hr = sec // 3600
min = (sec//60) % 60
sec = sec % 60
print(f'{hr} hours, {min} minutes, {sec} seconds')