/in/foo.cc: In function 'int main()':
/in/foo.cc:15:4: error: 'cin' was not declared in this scope
    cin >> n >> m;
    ^~~
/in/foo.cc:26:13: error: 'map' was not declared in this scope
         if (map[i][j] == 'X') answer[i][j] = -1;
             ^~~