Hi
I think something is wrong on codeforces!
I wrote a code for problem 745B - Hongcow Solves A Puzzle and got two different verdict
23067626 Hack
23072618 Accept
I also use codeforces compare system to figure out if there is any different between this 2 code (you can see the result of the compare on below picture )
as you can see there is no different :D