foo.cc: In function 'int main()':
foo.cc:29:12: warning: iteration 10000009 invokes undefined behavior [-Waggressive-loop-optimizations]
   29 |      if(h[i]==1) cout<<i<<endl;
      |         ~~~^
foo.cc:28:18: note: within this loop
   28 |     for(int i=1;i<=10000010;i++)
      |                 ~^~~~~~~~~~

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