foo.c: In function 'main':
foo.c:11:22: warning: 'n' is used uninitialized [-Wuninitialized]
   11 |         for(int i=0;i<n;i++)
      |                     ~^~
foo.c:9:13: note: 'n' was declared here
    9 |         int n;
      |             ^

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