/in/foo.cc: In function 'int main()':
/in/foo.cc:19:9: warning: iteration 10000 invokes undefined behavior [-Waggressive-loop-optimizations]
   if(t[i] > 0 && g[i])
      ~~~^
/in/foo.cc:18:19: note: within this loop
  for(int i = 1; i <= 10001; i++){
                 ~~^~~~~~~~