网址:https://leetcode.com/problems/remove-outermost-parentheses/ 使用栈的思想,选择合适的判断时机 class Solution { public: string removeOuterParentheses(string S) { stack<char> s_ch; string ans; stack<char> temp; , r = ; ; i<S.size(); i++) { if(S[i] == '(')…

https://leetcode-cn.com/problems/remove-outermost-parentheses/ Java Solution class Solution { public String removeOuterParentheses(String S) { char[] chars = S.toCharArray(); int flag = 0; StringBuilder result = new StringBuilder(); for (char c : cha…

problem 1021. Remove Outermost Parentheses 参考 1. Leetcode_easy_1021. Remove Outermost Parentheses; 完…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 遍历 日期 题目地址:https://leetcode.com/problems/remove-outermost-parentheses/ 题目描述 A valid parentheses string is either empty (""), "(" + A + ")", or A + B, w…

题目如下: A valid parentheses string is either empty (""), "(" + A + ")", or A + B, where A and B are valid parentheses strings, and + represents string concatenation.  For example, "", "()", "(())()"…

括号匹配想到用栈来做: class Solution: def removeOuterParentheses(self, S: str) -> str: size=len(S) if size==0: return "" i=0 strings=[] while i<size: stack=[S[i]] string=S[i] i+=1 while i<size: if S[i]=='(': stack.append(S[i]) else: stack.pop() s…

1021. 删除最外层的括号 1021. Remove Outermost Parentheses 题目描述 有效括号字符串为空 ("")."(" + A + ")" 或 A + B,其中 A 和 B 都是有效的括号字符串,+ 代表字符串的连接.例如,"","()","(())()" 和 "(()(()))" 都是有效的括号字符串. 如果有效字符串 S 非空,且不存在…

709. To Lower Case(Easy)# Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase. Example 1: Input: "Hello" Output: "hello" Example 2: Input: "here" Output: "here"…

5016. 删除最外层的括号  显示英文描述 我的提交返回竞赛   用户通过次数446 用户尝试次数469 通过次数456 提交次数577 题目难度Easy 有效括号字符串为空 ("")."(" + A + ")" 或 A + B,其中 A 和 B 都是有效的括号字符串,+ 代表字符串的连接.例如,"","()","(())()" 和 "(()(()))" 都是有效的…

A valid parentheses string is either empty (""), "(" + A + ")", or A + B, where A and B are valid parentheses strings, and +represents string concatenation.  For example, "", "()", "(())()", and …

删除最小数目的无效括号,使输入的字符串有效,返回所有可能的结果.注意: 输入可能包含了除 ( 和 ) 以外的元素.示例 :"()())()" -> ["()()()", "(())()"]"(a)())()" -> ["(a)()()", "(a())()"]")(" -> [""]详见:https://leetcode.com/…

这是小川的第380次更新,第408篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第242题(顺位题号是1021).有效的括号字符串为空(""),"("+ A +")"或A + B,其中A和B是有效的括号字符串,+表示字符串连接.例如,"","()","(())()"和"(()(()))"都是有效的括号字符串. 如果有效的括号字符串S是非空…

问题描述 有效括号字符串为空 ("")."(" + A + ")" 或 A + B,其中 A 和 B 都是有效的括号字符串,+ 代表字符串的连接.例如,"","()","(())()" 和 "(()(()))" 都是有效的括号字符串. 如果有效字符串 S 非空,且不存在将其拆分为 S = A+B 的方法,我们称其为原语(primitive),其中 A 和 B 都是非空…

有效括号字符串为空 ("")."(" + A + ")" 或 A + B,其中 A 和 B 都是有效的括号字符串,+ 代表字符串的连接.例如,"","()","(())()" 和 "(()(()))" 都是有效的括号字符串. 如果有效字符串 S 非空,且不存在将其拆分为 S = A+B 的方法,我们称其为原语(primitive),其中 A 和 B 都是非空有效括号字…

题目 解…

Leetcode之深度优先搜索(DFS)专题-301. 删除无效的括号(Remove Invalid Parentheses) 删除最小数量的无效括号,使得输入的字符串有效,返回所有可能的结果. 说明: 输入可能包含了除 ( 和 ) 以外的字符. 示例 1: 输入: "()())()" 输出: ["()()()", "(())()"] 示例 2: 输入: "(a)())()" 输出: ["(a)()()",…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()",…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Example 1: Input: "()())()" Output: ["()()…

[032-Longest Valid Parentheses(最长有效括号)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid pare…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Example 1: Input: "()())()" Output: ["()()…

Question Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()(…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()",…

题目: Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Examples: "()())()" -> ["()()()&quo…

我们根据List中的源码分析, remove方法的原理: public boolean remove(Object o){      if(o ==null) {           for(intindex=0;index< size;index++)                if(elementData[index] ==null) {                      fastRemove(index);returntrue;                }       …

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" con…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Example 1: Input: "()())()"Output: ["()()(…

Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Example 1: Input: "()())()" Output: ["()()…

［抄题］: Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the parentheses ( and ). Example 1: Input: "()())()" Output: [&quo…

原题链接在这里:https://leetcode.com/problems/remove-invalid-parentheses/ 题目: Remove the minimum number of invalid parentheses in order to make the input string valid. Return all possible results. Note: The input string may contain letters other than the par…

处理:所在代码行,最外层括号去掉…