[http://mirror.codeforces.com/contest/940/submission/36654025↵
](http://mirror.codeforces.com/contest/940/submission/36654025)↵
↵
[http://mirror.codeforces.com/contest/940/submission/36654074]( http://mirror.codeforces.com/contest/940/submission/36654074)↵
↵
IS THERE DIFFERENCE??????
↵
[http://mirror.codeforces.com/contest/940/submission/36654074]( http://mirror.codeforces.com/contest/940/submission/36654074)↵
↵
IS THERE DIFFERENCE??????