'''

Estimated time

15-20 minutes

Level of difficulty

Easy

Objectives

improving the ability to use numbers, operators, and arithmetic operations in Python;

using the print() function's formatting capabilities;

learning to express everyday-life phenomena in terms of programming language.

Scenario

Your task is to prepare a simple code able to evaluate the end time of a period of time, given as a number of minutes (it could be arbitrarily large). The start time is given as a pair of hours (0..23) and minutes (0..59). The result has to be printed to the console.

For example, if an event starts at 12:17 and lasts 59 minutes, it will end at 13:16.

Don't worry about any imperfections in your code - it's okay if it accepts an invalid time

- the most important thing is that the code produce valid results for valid input data.

Test your code carefully. Hint: using the % operator may be the key to success.

Test Data

Sample input:

12

17

59

Expected output: 13:16

Sample input:

23

58

642

Expected output: 10:40

Sample input:

0

1

2939

Expected output: 1:0

'''

# solution

hour = int(input("Starting time (hours): "))

mins = int(input("Starting time (minutes): "))

dura = int(input("Event duration (minutes): "))

end_mins = (mins + dura) % 60

end_hour = (hour + (mins + dura) // 60) % 24

print(end_hour, ":", end_mins)