Wrong Answer
/in/foo.cc: In function 'void erlar()': /in/foo.cc:13:25: warning: iteration 100054 invokes undefined behavior [-Waggressive-loop-optimizations] if (isnotprime[i]==false) ~~~~~~~~~~~~^ /in/foo.cc:12:18: note: within this loop for(int i=2;i<=maxn;i++){ ~^~~~~~