I was trying to do the problem COT2(http://www.spoj.com/problems/COT2/) which is solvable using Mo's Algorithm on trees in less than n*sqrt(n) but couldn't.... Wondering if a solution faster than exists?
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Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
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Codeforces Round 976 (Div. 2) and Divide By Zero 9.0
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