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Educational Codeforces Round 34 (Rated for Div. 2)
Dashboard - Educational Codeforces Round 34 (Rated for Div. 2) - Codeforces:
http://codeforces.com/contest/903
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masashinakata
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D、Wavelet Matrixで値域範囲限定累積和クエリ「rangesum(l, r, low, up) = 数列a[l, r)の中で、値が[low, up)の範囲にあるものだけを足したものを返す」がO(log n)でできるので、すげー楽です
2017-12-13 02:51:47