Given a binary tree, you need to find the length of Longest Consecutive Path in Binary Tree. Especially, this path can be either increasing or decreasing. For example, [1,2,3,4] and [4,3,2,1] are both considered valid, but the path [1,2,4,3] is not v…
题意:给定一个长度为N的序列,现在要求给出一个最长的序列满足序列中的元素严格上升并且相邻两个数字的下标间隔要严格大于d. 分析: 1.线段树 由于给定的元素的取值范围为0-10^5,因此维护一棵线段树,其中[l, r]的信息表示处理完前k个数时,序列最大元素落在[l, r]区间最长上升子序列的长度.从前往后处理给定的数组,处理到第 i 号元素时,更新第 i - d 号元素,这样就能够保证最长上升的序列间隔大于d,更新是需要更新到叶子节点的,但这里更新是单点更新,每次更新的位置是该元素的值,信息就…
compromise Time Limit:1000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Description In a few months the European Currency Union will become a reality. However, to join the club, the Maastricht criteria must be fulfilled, and this is…