Content:
0:00 Sheet#2_Z - statement
4:50 What is Time Limit Exceeded?
13:51 Sheet#2_Z - hint: try using two loops
14:48 Sheet#2_Z - solution
20:22 Sheet#2_I - statement & hint 1
25:20 Sheet#2_I - hint 2
27:00 Sheet#2_I - solution
28:08 Sheet#2_M - statement & hint
30:04 Sheet#2_M - solution
36:09 Sheet#2_U - statement & hint
38:00 Sheet#2_U - solution
41:55 Sheet#2_X - statement & hint 1
45:56 Sheet#2_X - hint 2
46:50 Sheet#2_X - solution
48:42 See others solution (pro tips)
Sheet#2 link: https://codeforces.com/group/MWSDmqGsZm/contest/219432