/in/foo.cc: In function 'int main()':
/in/foo.cc:14:18: warning: iteration 2009 invokes undefined behavior [-Waggressive-loop-optimizations]
   c[i][0]=c[i][i]=1;
           ~~~~~~~^~
/in/foo.cc:13:15: note: within this loop
  for(int i=1;i<=2011;i++)
              ~^~~~~~