foo.c: In function 'main':
foo.c:16:19: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   16 |          printf("%d ",answer);
      |                  ~^   ~~~~~~
      |                   |   |
      |                   int long long int
      |                  %lld

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