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leetcode第31题--Longest Valid Parentheses

Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…

leetcode解题报告 32. Longest Valid Parentheses 用stack的解法

第一道被我AC的hard题!菜鸡难免激动一下,不要鄙视.. Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has le…

LeetCode 笔记系列八 Longest Valid Parentheses [lich你又想多了]

题目:Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example i…

LeetCode （32） Longest Valid Parentheses

题目 Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example i…

【LeetCode每天一题】Valid Parentheses(有效的括弧)

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct…

leetcode解题报告 32. Longest Valid Parentheses 动态规划DP解

dp[i]表示以s[i]结尾的完全匹配的最大字符串的长度. dp[] = ; ; 开始递推 s[i] = ')' 的情况 先想到了两种情况: 1.s[i-1] = '(' 相邻匹配 这种情况下,dp [i] = dp[i-2] + 2. 2.s[i-1] = ')' 这种情况下,第一感觉是要看dp[i-1]的值,即 j...i-1是完全匹配的话,i相当于在外面再包一个括号. 如果s[i] 和 s[ i-1-dp[i-1] ] 匹配,dp[i] = dp[i-1] + 2.否则dp[i] = 0.…

LeetCode 32. 最长有效括号(Longest Valid Parentheses) 31

32. 最长有效括号 32. Longest Valid Parentheses 题目描述 给定一个只包含 '(' 和 ')' 的字符串,找出最长的包含有效括号的子串的长度. 每日一算法2019/6/3Day 31LeetCode32. Longest Valid Parentheses 示例 1: 输入: "(()" 输出: 2 解释: 最长有效括号子串为 "()" 示例 2: 输入: ")()())" 输出: 4 解释: 最长有效括号子串为…

【LeetCode每天一题】Longest Valid Parentheses（最长有效括弧）

Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. Example 1:             Input: "(()"                         Output: 2                      Explanation: The long…

【leetcode刷题笔记】Longest Valid Parentheses

Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…

[LeetCode] Longest Valid Parentheses 最长有效括号

Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", which has length = 2. Another example is &…