I was looking for a solution to a problem. I saw this in a function of that solution:
bool good(ll mid) { ll x = sqrt ( mid ); while( x * x > mid ) x-- ; while( ( x + 1 ) * ( x + 1 ) <= mid ) x++ ; return mid -x >= k; }
how is it possible that: sqrt ( mid ) * sqrt ( mid ) > mid ? or ( sqrt ( mid ) + 1 ) * ( sqrt ( mid ) + 1 ) <= mid ?
all this sqrt has floor value.
That problem link: https://mirror.codeforces.com/contest/2020/problem/B
