I tried to implement recent div2B with as optimised constant as i could. Can someone tell why my solutions TLE. It Tled 7 times in contest. I tried many approaches

eg submissions

https://mirror.codeforces.com/contest/1287/submission/68278756

https://mirror.codeforces.com/contest/1287/submission/68277154

Can someone tell why the first submission TLE on TC 10