Output: aedcbf. Answer: aedcbf. Checker comment: wrong answer 1st words differ : expected: 'aedcbf', found: 'aedcbf' http://codeforces.me/contest/525/submission/10478241 
:/
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Codeforces (c) Copyright 2010-2026 Михаил Мирзаянов
Соревнования по программированию 2.0
Время на сервере: 06.11.2026 13:22:03 (g2).
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10479111
I submitted it again using GNU C++ compiler and got the same problem. I don't know how it worked with you.
Igorjans code and yours differ in one line. Take a close look REP(i, 0, size(str) — 1) ... versus REP(i, 0, size(str)) in your code.
That fixed it. Thank you a lot!
"Expected doge, found doge"
I was laughing for a minute :D
I think extra "\0" causing problemoo. :D (string str="hello";//str="hello\0")
Thanks!
The picture is so damn good, i can't stop laughing.
So much 3tees