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