foo.c: In function 'Add':
foo.c:33:14: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized]
   33 |         if (c[n] > 0)
      |             ~^~~
foo.c:22:13: note: 'c' declared here
   22 |         int c[25000];
      |             ^

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