/in/foo.c: In function 'main':
/in/foo.c:13:16: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   13 |     printf("%11d\n",sum);
      |             ~~~^    ~~~
      |                |    |
      |                int  long long int
      |             %11lld