foo.c: In function 'main':
foo.c:23:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long int' [-Wformat=]
   23 |     printf("%d", d);
      |             ~^   ~
      |              |   |
      |              int long int
      |             %ld
foo.c:8:9: warning: unused variable 'n' [-Wunused-variable]
    8 |     int n = 0;
      |         ^

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