/in/foo.cc: In function 'void AS()':
/in/foo.cc:46:9: warning: iteration 9999999 invokes undefined behavior [-Waggressive-loop-optimizations]
  if(!v[i])
      ~~~^
/in/foo.cc:45:15: note: within this loop
  for(int i=1;i<=maix;i++)
              ~^~~~~~