A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two…

原题 A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than t…

[LeetCode]376. Wiggle Subsequence 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/wiggle-subsequence/description/ 题目描述: A sequence of numbers is called a wiggle sequence if the differences betw…

Week13 - 376. Wiggle Subsequence A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative…

A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two…

本题要求在O(n)时间内求解.用delta储存相邻两个数的差,如果相邻的两个delta不同负号,那么说明子序列摇摆了一次.参看下图的nums的plot.这个例子的答案是7.平的线段部分我们支取最左边的一个点.除了最左边的边界点,我们要求delta != 0, 并且newDelta * delta <= 0.(这里不能只取<号),否则dot 5和7就会被忽略,因为他们的newDelta*delta = 0. def wiggleMaxLength(self, nums): ""…

A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two…

Description: A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fe…

A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The first difference (if one exists) may be either positive or negative. A sequence with fewer than two…

376. 摆动序列 如果连续数字之间的差严格地在正数和负数之间交替,则数字序列称为摆动序列.第一个差(如果存在的话)可能是正数或负数.少于两个元素的序列也是摆动序列. 例如, [1,7,4,9,2,5] 是一个摆动序列,因为差值 (6,-3,5,-7,3) 是正负交替出现的.相反, [1,4,7,2,5] 和 [1,7,4,5,5] 不是摆动序列,第一个序列是因为它的前两个差值都是正数,第二个序列是因为它的最后一个差值为零. 给定一个整数序列,返回作为摆动序列的最长子序列的长度. 通过从原始序列…