https://leetcode.com/problems/132-pattern/ 下面是我的做法.后来又看了一个提示: https://discuss.leetcode.com/topic/67881/single-pass-c-o-n-space-and-time-solution-8-lines-with-detailed-explanation 里面的解法非常好.先从后向前找到中间那个数.利用了栈的特性,非常好. package com.company; import java.uti…

Given a sequence of n integers a1, a2, ..., an, a 132 pattern is a subsequence ai, aj, ak such that i < j < k and ai < ak < aj. Design an algorithm that takes a list of n numbers as input and checks whether there is a 132 pattern in the list.…

Given a sequence of n integers a1, a2, ..., an, a 132 pattern is a subsequence ai, aj, ak such that i < j < k and ai < ak < aj. Design an algorithm that takes a list of n numbers as input and checks whether there is a 132 pattern in the list.…

463. Island Perimeterhttps://leetcode.com/problems/island-perimeter/就是逐一遍历所有的cell,用分离的cell总的的边数减去重叠的边的数目即可.在查找重叠的边的数目的时候有一点小技巧,就是沿着其中两个方向就好,这种题目都有类似的规律,就是可以沿着上三角或者下三角形的方向来做.一刷一次ac,但是还没开始注意codestyle的问题,需要再刷一遍. class Solution { public: int islandPerime…

1. 1-bit and 2-bit Characters We have two special characters. The first character can be represented by one bit 0. The second character can be represented by two bits (10 or 11). Now given a string represented by several bits. Return whether the last…

给定一个整数序列:a1, a2, ..., an,一个132模式的子序列 ai, aj, ak 被定义为:当 i < j < k 时,ai < ak < aj.设计一个算法,当给定有 n 个数字的序列时,验证这个序列中是否含有132模式的子序列.注意:n 的值小于15000.示例1:输入: [1, 2, 3, 4]输出: False解释: 序列中不存在132模式的子序列. 示例 2:输入: [3, 1, 4, 2]输出: True解释: 序列中有 1 个132模式的子序列: [1,…

给定一个整数序列:a1, a2, ..., an,一个132模式的子序列 ai, aj, ak 被定义为:当 i < j < k 时,ai < ak < aj.设计一个算法,当给定有 n 个数字的序列时,验证这个序列中是否含有132模式的子序列. 注意:n 的值小于15000. 示例1: 输入: [1, 2, 3, 4] 输出: False 解释: 序列中不存在132模式的子序列. 示例 2: 输入: [3, 1, 4, 2] 输出: True 解释: 序列中有 1 个132模式的…

[LeetCode]456. 132 Pattern 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/132-pattern/description/ 题目描述: Given a sequence of n integers a1, a2, -, an, a 132 pattern is a subs…