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Stuck in problem. sqrt ( mid ) * sqrt ( mid ) > mid how? please help.
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 ?
That problem link: https://codeforces.net/contest/2020/problem/B
