/in/foo.cc: In function 'int main()':
/in/foo.cc:9:7: warning: iteration 90 invokes undefined behavior [-Waggressive-loop-optimizations]
   F[i]=F[i/10]+F[i%10];
   ~~~~^~~~~~~~~~~~~~~~
/in/foo.cc:8:16: note: within this loop
  for(int i=10;i<=100;i++){
               ~^~~~~