/in/foo.cc: In function 'int main()':
/in/foo.cc:9:26: warning: iteration 13 invokes undefined behavior [-Waggressive-loop-optimizations]
    9 |                 if(n%xy[i]==0)
      |                      ~~~~^
/in/foo.cc:7:22: note: within this loop
    7 |         for(int i=0;i<=13;i++)
      |                     ~^~~~