foo.cc: In function 'int main()':
foo.cc:18:25: error: 'cin' was not declared in this scope
   18 |                         cin >> jz[i][j];
      |                         ^~~
foo.cc:24:34: error: 'check_x' was not declared in this scope; did you mean 'check_y'?
   24 |                         out_d += check_x(jz, i, 0);
      |                                  ^~~~~~~
      |                                  check_y
foo.cc:39:17: error: 'cout' was not declared in this scope; did you mean 'out'?
   39 |                 cout << -1;
      |                 ^~~~
      |                 out
foo.cc:41:17: error: 'cout' was not declared in this scope; did you mean 'out'?
   41 |                 cout << out;
      |                 ^~~~
      |                 out

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