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…

这星期听别人说在做LeetCode,让他分享一题来看看.试了感觉挺有意思,可以培养自己的思路,还能方便的查看优秀的解决方案.准备自己也开始. 解决方案通常有多种多样,我觉得把自己的解决思路记录下来,阶段性查看,一定能对自己有帮助. 这是我做的第一题,所以记录也从这题开始,之后尽力以简短的说明,描述出思路,方便以后能回顾到简介明了的记录. 20. Valid Parentheses Given a string containing just the characters '(', ')', '{…

# -*- 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. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]&quo…

20. Valid Parentheses 错误解法: "[])"就会报错,没考虑到出现')'.']'.'}'时,stack为空的情况,这种情况也无法匹配 class Solution { public: bool isValid(string s) { if(s.empty()) return false; stack<char> st; st.push(s[]); ;i < s.size();i++){ if(s[i] == '(' || s[i] == '['…

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…

1.题目 20. Valid Parentheses——Easy  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 brac…

一.题目说明 这个题目是20. Valid Parentheses,简单来说就是括号匹配.在学数据结构的时候,用栈可以解决.题目难度是Medium. 二.我的解答 栈涉及的内容不多,push.pop.top,. 我总共提交了3次: 第1次:Runtime Error,错误原因在于pop的时候,未判断栈是否为空. 第2次:Wrong Answer,这个是"眼大"疏忽导致的,我写的时候只考虑了()[]未考虑{}. 第3次:终于正确了,性能还可以: Runtime: 0 ms, faster…

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…

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…

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…

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…

Valid Parentheses  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 ')', find the length of the longest valid (well-formed) parentheses substring. Example 1: Input: "(()" Output: 2 Explanation: The longest valid parentheses substring is "()" Example…

题目描述: 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 "([)…

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 "([)]"…

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 "([)]&q…

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

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…

1.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 "([)…

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 "([)]"…

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 "([)]"…

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

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 "(]"…

题目内容: 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 "([)…

转载:https://leetcode.windliang.cc/leetCode-20-Valid%20Parentheses.html 描述 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…

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 "([)]"…

题目链接 https://leetcode.com/problems/valid-parentheses/?tab=Description   Problem: 括号匹配问题. 使用栈,先进后出!   参考代码1: package leetcode_50; import java.util.Stack; /*** * * @author pengfei_zheng * 括号匹配问题 */ public class Solution20 { public static boolean isVali…

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 "([)]"…

09.18更新算法采用栈的思想解决,方法①所示. 本题主要是找是否有匹配的字符串,因为还没有复习到栈之类的知识点,只能还是采用暴力方法了,后期会补上更加优化的算法.我的思路就是先遍历一遍找是否有匹配的符号,有的话就删除,然后继续遍历,直至结束. Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brac…