[HackerEarth] Let's assume that set Z consists of m distinct intervals [l1, r1], [l2, r2], ..., [lm, rm] (1 ≤ li ≤ ri ≤ n; li, ri are integers). - 题解

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题目信息
题号 P16931
标题 [HackerEarth] Let's assume that set Z consists of m distinct intervals [l1, r1], [l2, r2], ..., [lm, rm] (1 ≤ li ≤ ri ≤ n; li, ri are integers).
难度 普及
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