foo.cc: In function 'int main()':
foo.cc:23:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
   23 |                 printf("%d\n", count);
      |                         ~^     ~~~~~
      |                          |     |
      |                          int   long int
      |                         %ld

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