View Compilation Error

0_0_24451079_28069.cpp: In function 'void solve(int)':
0_0_24451079_28069.cpp:31:27: error: invalid types 'int[int]' for array subscript
 int &co = cost[from][to][s];
                           ^
0_0_24451079_28069.cpp:41:16: error: 'm' was not declared in this scope
 for(auto t:cnt[m-1]){
                ^
0_0_24451079_28069.cpp:47:54: error: invalid types 'int[int]' for array subscript
        cur[to]=min(cur[to],pre[from]+cost[from][to][s]);
                                                      ^
0_0_24451079_28069.cpp:53:17: error: 'm' was not declared in this scope
  for(auto t:cnt[m]){
                 ^
0_0_24451079_28069.cpp:58:9: error: 'm' was not declared in this scope
  ans[n][m][0]=1;
         ^