2020年2月24日
线段树（单点修改，区间求和，区间最大）
摘要： （一）线段树 1.E - Lost Cows N (2 <= N <= 8,000) cows have unique brands in the range 1..N. In a spectacular display of poor judgment, they visited the neig 阅读全文
posted @ 2020-02-24 23:14 清风紫雪 阅读(401) 评论(0) 推荐(0)
二叉树
摘要： （一）二叉树 1.A - Binary Tree Traversals A binary tree is a finite set of vertices that is either empty or consists of a root r and two disjoint binary tre 阅读全文
posted @ 2020-02-24 22:11 清风紫雪 阅读(232) 评论(0) 推荐(0)