Russian Doll Envelopes 描述 You have a number of envelopes with widths and heights given as a pair of integers (w, h). One envelope can fit into another if and only if both the width and height of on

https://leetcode.com/problems/russian-doll-envelopes/description/ LIS就能过掉 然后暴力O(n^2)的写法 bool cmp_small(pair<int, int> a, pair<int, int>b) {if (a.first == b.first) return a.second > b.second;else

2020-2021 ICPC, NERC, Southern and Volga Russian Regional Contest (Online Mirror, ICPC Rules) D 考虑一条长长的走廊，它可以被分成大小为 1×1 的 n  个正方形单元格。这些单元格从左到右依次编号为 1 至 n 。 走廊上有两个人，一个小流氓和一个保安。一开始，流氓在 ath单元，保安在 bth

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