foo.cc: In function 'int main()':
foo.cc:13:23: warning: iteration 10009 invokes undefined behavior [-Waggressive-loop-optimizations]
   13 |                 if(a[i]>0)
      |                    ~~~^
foo.cc:12:22: note: within this loop
   12 |         for(int i=1;i<=10010;i++)
      |                     ~^~~~~~~

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