Sheet 2 - Upsolve part 2

Sheet Link : vjudge.net/gro...
Timeline:
00:00 - 10:42 Problem P
10:43 - 22:27 Problem Q
22:28 - 35:18 Problem R
35:19 - 49:12 Problem S
49:13 - 1:01:19 Problem T
1:01:20 - 1:10:49 Problem U
1:10:50 - 1:18:40 Problem W
1:18:41 - 1:24:17 Problem X