Please give me some tests, my program passed all the tests on the forum

Edited by author 22.07.2020 04:11

3
3:00:00
4:00:00
12:00:00
answer: 4:00:00

4
1:00:00
6:00:00
6:00:00
12:00:00
answer: 6:00:00

3
1:00:00
6:00:00
12:00:00
answer: 1:00:00