暴力枚举
 1 #include <iostream>

 #include <vector>

 #include <string>

 using namespace std;

 class FoxAndClassroom{

 public:

     string ableTo(int n , int m){

         for(int  i =  ; i < n ; ++ i ){

             for(int j  =  ;  j < m; ++ j ){

                 vector<vector<bool> > visitFlag(n,vector<bool>(m,false));

                 int kx = i ,ky = j,count = ;

                 while(!visitFlag[kx][ky]){

                     visitFlag[kx][ky] = true;

                     kx = (kx+)%n;

                     ky = (ky+)%m;

                     count++;

                 }

                 if(count ==  m*n) return "Possible";

             }

         }

         return "Impossible";

     }

 };