暴力枚举 1 #include <iostream> #include <vector> #include <string> using namespace std; class FoxAndClassroom{ public: string ableTo(int n , int m){ ; i < n ; ++ i ){ ; j < m; ++ j ){ vector<vector<bool> > visitFlag(n,vecto…
题意: For an integer n, let F(n) = (n - 0^2) * (n - 1^2) * (n - 2^2) * (n - 3^2) * ... * (n - k^2), where k is the largest integer such that n - k^2 > 0. You are given three long longs lo, hi and divisor. It is guaranteed that divisor will be a prime n…