/in/foo.cc: In function 'int main()':
/in/foo.cc:11:7: warning: iteration 200010 invokes undefined behavior [-Waggressive-loop-optimizations]
   b[i]=i;
   ~~~~^~
/in/foo.cc:9:15: note: within this loop
  for(int i=0;i<=200010;i++)
              ~^~~~~~~~