Problem: https://codeforces.com/contest/920/problem/E' Why is it giving TLE. Submission: https://codeforces.com/contest/920/submission/56808023 Thanks in advance.

Why does this code only get 20 points. https://ideone.com/P1TT3z Problem: https://codeforces.com/group/swEqtABRxe/contest/243430/problem/B

Why is this code getting RTE? https://ideone.com/fork/KqmvTw The problem statememt: https://cses.fi/problemset/task/1092 Thanks in advance.

Hi I am new to cp. What paths can I follow to ensure quick progress and high ranks in future ioi and what topics should I learn by order. I would appreciate your help.