/in/foo.cc: In function 'int main()':
/in/foo.cc:9:23: error: invalid types 'int[int]' for array subscript
    9 |     cin >> n >> n >> n[2];
      |                       ^
/in/foo.cc:15:30: error: invalid types 'int[int]' for array subscript
   15 |         for (int j = 0; j < n[i]; ++j) {
      |                              ^