Problem Link: https://codeforces.net/contest/1809/problem/B
(Recent Edu Round Problem B)
Please watch these submissions for Problem B from my id:
https://codeforces.net/contest/1809/submission/198866759 : Says TLE on Test 1
https://codeforces.net/contest/1809/submission/198864293 : Says WA on Test 2
And now watch the same solution submitted by my friend after contest:
https://codeforces.net/contest/1809/submission/198867203 : SAYS AC !
Please explain the happening !
also all I tried to hack a cout<<sqrt(n-1) solution and I failed, so please find the bug.