0:00 Intro and contest start.
0:41 Solving problem A.
2:26 Struggling over problem B,not able to solve.
6:10 Switching to problem C, got wrong idea.
11:10 Realising wrong idea for problem C,switching back to B,solving B.
17:44- Solving problem C.
30:28 Reading problem D, not able to come up with any idea.
41:00 Giving up finally and contest end.