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Educational Codeforces Round 10 D. Nested Segments Beserious 2016-03-28 20:06 阅读:207 评论:0 推荐:0 编辑   
D. Babaei and Birthday Cake--- Codeforces Round #343 (Div. 2) Beserious 2016-02-24 10:38 阅读:426 评论:0 推荐:0 编辑   
usaco2008 nov 区间异或求和 Beserious 2015-10-04 17:06 阅读:315 评论:0 推荐:0 编辑