/in/foo.cc: In function 'int main()':
/in/foo.cc:8:17: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
    8 |  while (scanf("%d", &a) != EOF)
      |                ~^   ~~
      |                 |   |
      |                 |   long long int*
      |                 int*
      |                %lld