foo.c: In function 'main':
foo.c:13:35: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
   13 |                         printf("%ld",n);
      |                                 ~~^  ~
      |                                   |  |
      |                                   |  int
      |                                   long int
      |                                 %d

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