[http://mirror.codeforces.com/contest/940/submission/36654025](http://mirror.codeforces.com/contest/940/submission/36654025)↵
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[http://mirror.codeforces.com/contest/940/submission/36654074]( http://mirror.codeforces.com/contest/940/submission/36654074)↵
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IS THERE DIFFERENCE??????↵
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PS.nothing offensive,but if you know why it happened，please telll me.I 've been in codeforces in years,and never seen thing like this.↵
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If you are as.confused as me,then just go.↵
↵
By the way,I noticed that this question gets some negatives,but with no comment.If you have some idea,just comment it.If not then you are not who I ask help to.Thanks.
↵
[http://mirror.codeforces.com/contest/940/submission/36654074]( http://mirror.codeforces.com/contest/940/submission/36654074)↵
↵
IS THERE DIFFERENCE??????↵
↵
PS.nothing offensive,but if you know why it happened，please telll me.I 've been in codeforces in years,and never seen thing like this.↵
↵
If you are as.confused as me,then just go.↵
↵
By the way,I noticed that this question gets some negatives,but with no comment.If you have some idea,just comment it.If not then you are not who I ask help to.Thanks.
