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I entered Educational Codeforces Round 48, and I got WA in problem E.
With the contest end, I checked command : wrong answer 154th numbers differ — expected: '0.0000000', found: '-0.0000000', error = '-0.0000000'
I tried change -0 to 0 with abs function, but it doesn't work.
My source code : http://codeforces.net/contest/1016/submission/41186743
Why this happens, and how can I fix it? Does it have a meaning that I do not know at -0.000?
http://codeforces.net/contest/913/submission/34021734 Accepted
http://codeforces.net/contest/913/submission/34049526 Wrong answer on test 4
http://codeforces.net/contest/913/submission/34049558 Accepted
What is diffrent ? I edit just one line about ll b in dfs function..
