我现在在做一个叫<leetbook>的免费开源书项目,力求提供最易懂的中文思路,目前把解题思路都同步更新到gitbook上了,需要的同学可以去看看 书的地址:https://hk029.gitbooks.io/leetbook/ 20. Valid Parentheses 问题 Given a string containing just the characters ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[’ and ‘]’, determine if the input string…

https://leetcode.com/problems/valid-parentheses/ 原题: Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}"…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 20: Valid Parentheseshttps://oj.leetcode.com/problems/valid-parentheses/ Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is vali…

20.Valid Parentheses 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…

class Solution { public: bool isValid(string s) { stack<char> brackts; ; i < s.size(); i++) { if(s[i] == '(' || s[i] == '[' || s[i] == '{') brackts.push(s[i]); else if(brackts.empty() || s[i] == ')' && brackts.top() != '(' || s[i] == ']'…

作者: 负雪明烛 id: fuxuemingzhu 个人博客:http://fuxuemingzhu.cn/ 个人公众号:负雪明烛 本文关键词:有效,括号,括号匹配,栈,题解,leetcode, 力扣,Python, C++, Java 目录 题目描述 题目大意 解题方法 Java解法 Python解法 日期 题目地址:https://leetcode.com/problems/valid-parentheses/#/description 题目描述 Given a string contain…

一天一道LeetCode系列 (一)题目 Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]"…

Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]"…

1. 原题链接 https://leetcode.com/problems/valid-parentheses/description/ 2. 题目要求 给定一个字符串s,s只包含'(', ')', '{', '}', '[' 和 ']'. 合法:形如“()[]“.”{[()]}“ 不合法:形如“([)]”.“[[((” 判断所给字符串s是否合法. 3. 解题思路 对字符串s转换成字符数字进行遍历. 利用栈,遇到左半边字符:'('.'['.'{'时,将其对应的右半边字符进行入栈.遇到不是左半边字…

题目: Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" and "([)]&…