parentheses 第24页

careercup-递归和动态规划 9.6

类似leetcode：Generate Parentheses 解法：从头开始构造字符串，从而避免出现重复字符串。在这个解法中，逐一加入左括号和右括号，只有字符串仍然有效。

·2015-11-10 23:25

LeetCode 22 Generate Parentheses（生成括号）

翻译给定一个括号序列，写一个函数用于生成正确形式的括号组合。例如，给定n=3，一个解决方案集是： "((()))","(()())","(())()","()(())","()()()"原文Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,give

NoMasp·2015-11-10 22:00

[leetcode]Longest Valid Parentheses

第二刷：首先，此题可以用O(n)的空间做，就是第一遍标识所有匹配的位置，第二遍找最长连续的匹配就行了。那么改善一点就是记录上一个不匹配的位置就行了，上一个不匹配的位置有两种，一种是多余的')'，这个用一个变量记录；另一个是'('，这个用栈记录。 class Solution { public: int longestValidParentheses(string s) {

·2015-11-10 21:27

[leetcode]Generate Parentheses

简单题。DFS。还是用Java写函数麻烦了。一开始把left<n的条件忘了。 import java.util.ArrayList; public class Solution { public ArrayList<String> generateParenthesis(int n) { // Start typing your Java s

·2015-11-10 21:19

[leetcode]Valid Parentheses

简单题。使用stack就行了。不过一开始忘了判断'['和']'的情况。要判断stack是否为空。 #include <string> #include <stack> using namespace std; class Solution { public: bool isValid(string s) { // Start

·2015-11-10 21:18

LeetCode 20 Valid Parentheses（有效的括号）

翻译给定一个只包含'(',')','{','}','['和']'的字符串，判断这个输入的字符串是否是有效的。括号必须在正确的形式下闭合，"()"和"()[]{}"是有效的，但是"(]"和"([)]"则不是。原文Givenastringcontainingjustthecharacters'(',')','{','}','['and']', determineiftheinputstringis

NoMasp·2015-11-10 20:00

LeetCode----Generate Parentheses

GenerateParenthesesGiven n pairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,given n =3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"分析：生成合法的括

whiterbear·2015-11-10 15:00

[LeetCode] Different Ways to Add Parentheses

Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidoperatorsare+,-and*.Example1Input:"2-1-1".((2-1)-1)=0(2-(1-1))=2Out

u011331383·2015-11-09 18:00

[LeetCode] Remove Invalid Parentheses

Removetheminimumnumberofinvalidparenthesesinordertomaketheinputstringvalid.Returnallpossibleresults.Note:Theinputstringmaycontainlettersotherthantheparentheses(and).Examples:“()())()”->[“()()()”,“(())

u011331383·2015-11-09 16:00

LeetCode Generate Parentheses

class Solution { public: vector<string> generateParenthesis(int n) { string str; vector<string> res; dfs(n, 0, 0, str, res); return res; }

·2015-11-09 14:50

Generate Parentheses

题意是要求生成匹配的括号结果。假如给定n = 3，需要生成3对括号的有效组合，即"((()))", "(()())", "(())()", "()(())", "()()()"。 void unguarded_generate(vector<stri

·2015-11-09 12:32

Leetcode#22 Generate Parentheses

原题地址《Cracking the Code》一书中出现过这道题，那里面提到了多种解法，这里用最简单的枚举法。 DFS枚举，令leftRemain表示当前还剩下几个"("可用，rightRemain表示当前还剩下几个")"可用。如果leftRemain > 0，那么总可以放一个"(" 如果leftRema

·2015-11-09 12:08

Leetcode#32 Longest Valid Parentheses

原题地址方法I：动态规划 len[i]表示从i开始到结束的最长合法括号串长度，则：如果s[i] == "(" 且 s[i+len[i+1]+1]==")"，len[i] = len[i+1] + 2 否则len[i] = 0 方法II：辅助栈跟那个直方图求最大面积有点类似，用一个栈保存合法括号串的长度，显然长

·2015-11-09 12:57

Generate Parentheses

https://oj.leetcode.com/problems/generate-parentheses/ Given n pairs of parentheses, write a function

·2015-11-09 11:08

poj1068模拟法

#include#includeusingnamespacestd;vectorparentheses;voidadd_parentheses(inti1,inti2){for(inti=

Jacoding·2015-11-09 01:35

Gym 100803G Flipping Parentheses

题目链接：http://codeforces.com/gym/100803/attachments/download/3816/20142015-acmicpc-asia-tokyo-regional-contest-en.pdf题意：给你一些匹配好的括号，长为n，有m个操作，每次操作把其中一个"("改为")"，或者把其中一个")"改为"(",问你改动一个单括号，使得改后的括号序列任然完美匹配，如

Kirito_Acmer·2015-11-08 21:00

Fraction to Recurring Decimal

If the fractional part is repeating, enclose the repeating part in parentheses. For

·2015-11-08 15:09

UVA 673 Parentheses Balance 解题心得

原题 Description You are given a string consisting of parentheses () and [

·2015-11-08 14:34

LeetCode题解——Different Ways to Add Parentheses

Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidoperatorsare+, - and *.Example1Input: "2-1-1".((2-1)-1)=0 (2-(1-1))

u010025211·2015-11-08 11:00

leetcode 栈括号匹配

https://oj.leetcode.com/problems/valid-parentheses/ 遇到左括号入栈，遇到右括号出栈找匹配，为空或不匹配为空， public class Solution

·2015-11-08 11:20

Generate Parentheses (2 solutions)

Generate Parentheses Given n pairs of parentheses, write a function to generate all combinations

·2015-11-08 11:23

Longest Valid Parentheses (2 solutions)

Longest Valid Parentheses Given a string containing just the characters '(' and ')',

·2015-11-08 11:18

LeetCode：Valid Parentheses - 合理的括号搭配

1、题目名称ValidParentheses（合理的括号搭配）2、题目地址https://leetcode.com/problems/valid-parentheses/3、题目内容英文：Givenastringcontainingjustthecharacters

北风其凉·2015-11-08 10:00

Leetcode#20 Valid Parentheses

原题地址辅助栈代码： 1 bool isValid(string s) { 2 stack<char> st; 3 4 for (auto c : s) { 5 if (st.empty()) 6 st.push(c

·2015-11-08 10:18

《leetCode》：Generate Parentheses（hard）

题目Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,givenn=3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"错误的思路思路：由于只有一种括号，合法性就是在任何位置来看，

u010412719·2015-11-07 20:00

difference between new Test and new Test()

http://stackoverflow.com/questions/620137/do-the-parentheses-after-the-type-name-make-a-difference-with-new

·2015-11-07 13:22

Parencodings

Description Let S = s1 s2...s2n be a well-formed string of parentheses.

·2015-11-07 11:28

Valid Parentheses

Valid Parentheses Given a string containing just the characters '(', ')', '{', '

·2015-11-07 11:18

POJ1068——模拟——Parencodings

Description Let S = s1 s2...s2n be a well-formed string of parentheses.

·2015-11-07 10:51

UVa 673 Parentheses Balance【栈】

题意：输入一个包含"()"和"[]"的序列，判断是否合法用栈来模拟，遇到"（"，“[”就入栈，遇到')',']'就取出栈顶元素看是否匹配，如果不匹配，则不合法还有注意一下每次取出栈顶元素的时候判断栈是否为空，如果为空就要跳出循环注意空串也是合法的串 1 #include<iostream> 2

·2015-11-07 10:18

Valid Parentheses

Valid Parentheses 问题： Given a string containing just the characters '(', ')', '{',

·2015-11-07 09:49

《leetCode》：Valid Parentheses

题目Givenastringcontainingjustthecharacters'(',')','{','}','['and']',determineiftheinputstringisvalid. Thebracketsmustcloseinthecorrectorder,"()"and"()[]{}"areallvalidbut"(]"and"([)]"arenot.思路这个题目不难，借用

u010412719·2015-11-06 22:00

[LeetCode] Valid Parentheses

Givenastringcontainingjustthecharacters'(',')','{','}','['and']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,"()"and"()[]{}"areallvalidbut"(]"and"([)]"arenot.Subscribetoseew

u011331383·2015-11-06 16:00

Different Ways to Add Parentheses

题目链接原题Givenastringofnumbersandoperators, returnallpossibleresultsfromcomputing allthedifferentpossiblewaystogroupnumbers andoperators.Thevalidoperatorsare+,-and*. Example1 Input:"2-1-1". ((2-1)-1)=0

xuanyoumeng·2015-11-05 23:00

[LeetCode] Remove Invalid Parentheses

ThisproblemcanbesolvedveryelegantlyusingBFS,asinthispost.ThecodeisrewrittenbelowinC++.1classSolution{ 2public: 3vectorremoveInvalidParentheses(strings){ 4vectorparens; 5queuecandidates; 6unordere

jcliBlogger·2015-11-05 15:00

【LeetCode】224. Basic Calculator

The expression string may contain open ( and closing parentheses ), the plus +

·2015-11-05 08:27

Generate Parentheses

Generate Parentheses 问题： Given n pairs of parentheses, write a function to generate all combinations

·2015-11-03 21:48

LeetCode -- Remove Invalid Parentheses

题目描述：Removetheminimumnumberofinvalidparenthesesinordertomaketheinputstringvalid.Returnallpossibleresults.Note:Theinputstringmaycontainlettersotherthantheparentheses(and).Examples:"()())()"->["()()()",

csharp25·2015-11-03 19:00

Leetcode 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,

·2015-11-02 19:56

LeetCode Valid Parentheses

1 class Solution { 2 public: 3 bool isValid(string s) { 4 char open[] = {'(', '[', '{'}; 5 char close[]= {')', ']', '}'}; 6 7 int count[3] = {0, 0, 0}

·2015-11-02 19:17

Valid Parentheses

https://oj.leetcode.com/problems/valid-parentheses/ Given a string containing just the characters

·2015-11-02 17:28

Different Ways to Add Parentheses

Different Ways to Add Parentheses Given a string of numbers and operators, return all possible results

·2015-11-02 16:24

ACM平衡的括号

Description You are given a string consisting of parentheses () and [].

·2015-11-02 14:02

Longest Valid Parentheses

Longest Valid Parentheses 问题： Given a string containing just the characters '(' and

·2015-11-02 14:51

【leetcode】Generate Parentheses

Given n pairs of parentheses, write a function to generate all combinations of well-formed

·2015-11-02 10:16

Leetcode Longest Valid Parentheses

错误代码： 1 #include<iostream> 2 3 using namespace std; 4 5 int longestValidParentheses(string s) 6 { 7 int i = 0; 8 int L = s.length(); 9 int j; 10 int max

·2015-11-01 15:18

UVa 673 (括号配对) Parentheses Balance

本来是当做水题来做的，后来发现这道题略坑。首先输入的字符串可能是空串，所以我用了gets函数，紧接着就被scanf("%d", &n)后面的换行符坑掉了。于是乎再加一句getchar() 1 #include <cstdio> 2 #include <stack> 3 #include <cstring>

·2015-11-01 14:01

Basic Calculator

The expression string may contain open ( and closing parentheses ), the plus +

·2015-11-01 13:12

uva 673 Parentheses Balance

水题照题意模拟即可 #include <stdio.h> #include <string.h> #define MAX 130 char s[MAX]; int main() { int i,n,top,len; char temp[MAX],ch; scanf("%d",&n); g

·2015-10-31 19:27

LeetCode Basic Calculator

The expression string may contain open ( and closing parentheses ), the plus +

·2015-10-31 18:02

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