/in/foo.cc: In function 'int main()':
/in/foo.cc:28:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int*' [-Wformat=]
   28 |     printf("%d",&ans);
      |             ~^  ~~~~
      |              |  |
      |              |  int*
      |              int
      |             %n