foo.cc: In function 'int main()':
foo.cc:40:26: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   40 |                 printf("%d\n", cnt);
      |                         ~^     ~~~
      |                          |     |
      |                          int   long long int
      |                         %lld

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