parentheses 第20页

[LeetCode]Different Ways to Add Parentheses

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

CiaoLiang·2016-03-28 14:00

Longest Valid Parentheses

Givenastringcontainingjustthecharacters '(' and ')',findthelengthofthelongestvalid(well-formed)parenthesessubstring.For "(()",thelongestvalidparenthesessubstringis "()",whichhaslength=2.Anotherexample

u014568921·2016-03-27 11:00

Valid Parentheses

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

u014568921·2016-03-27 10:00

Leetcode #22 Generate Parentheses 创建括号解题报告

1解题思路这道题是创建括号对，在做题之前可以首先看下这个Leetcode#20ValidParentheses括号验证解题小节，这道题的意思也就是给一个数值n，问你用n对圆括号（）可以怎么组合？首先来说，基本的想法肯定就是递归了，这个很简单，我就不细说，我只再说下什么是合法的括号对1、无论什么时候”(“的数量都大于等于“）”就这条规则，所以递归的时候你们知道怎么递归了吧？2原题GeneratePa

MebiuW·2016-03-24 22:00

leetcode: Valid Parentheses

问题描述：Givenastringcontainingjustthecharacters '(', ')', '{', '}', '[' and ']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder, "()" and "()[]{}" areallvalidbut "(]" and "([)]" ar

frank-liu·2016-03-24 19:42

Valid Parentheses

Givenastringcontainingjustthecharacters‘(‘,‘)’,‘{‘,‘}’,‘[’and‘]’,determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,“()”and“()[]{}”areallvalidbut“(]”and“([)]”arenot.括号的匹配问题，用stack来

·2016-03-24 19:00

Valid Parentheses [Difficulty: Easy]

题目：Givenastringcontainingjustthecharacters,determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,“()”and“()[]{}”areallvalidbut“(]”and“([)]”arenot.翻译：给定一个字符串，只包含’(‘,‘)’,‘{‘,‘}’,‘[’和’]’

Lnho2015·2016-03-24 13:00

Valid Parentheses [Difficulty: Easy]

题目：Givenastringcontainingjustthecharacters,determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,“()”and“()[]{}”areallvalidbut“(]”and“([)]”arenot.翻译：给定一个字符串，只包含’(‘,‘)’,‘{‘,‘}’,‘[’和’]’

Lnho2015·2016-03-24 13:00

24.leetcode题目20： Valid Parentheses

前言：这道题目在《数据结构》这本书上有讲，学习真的很重要啊！题目：Givenastringcontainingjustthecharacters '(', ')', '{', '}', '[' and ']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder, "()" and "()[]{}" areal

hzj379805931·2016-03-23 22:00

Leetcode #20 Valid Parentheses 括号验证解题小节

1题目理解这道题，做的事情就是匹配{}[]()等括号的工作，检查其是否合法。其实所谓的合法就是：有几个左边的，就有几个右边的，只要左括号的出现和右括号出现的次数一样。。。并且左边的一定比右边的先出现。。所以做法就是：1、设置六个变量或者使用数组，分别记录这三类括号的左边，和右边出现的频率，遇到左边的就+1，右边也是对应的+1。2、在遍历的过程中，每对括号右边的计数不能大于左边的，不然就不合法了3、

MebiuW·2016-03-22 23:00

Generate Parentheses

Given n pairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,given n =3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"classSolution{ voiddo_once(s

u014568921·2016-03-20 23:00

Valid Parentheses

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

a342500329a·2016-03-18 19:00

Valid Parentheses

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

qq_27991659·2016-03-17 09:00

Valid Parentheses

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

Andrewseu·2016-03-14 21:00

Valid Parentheses

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

Chenyt01·2016-03-12 18:00

Remove Invalid Parentheses

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

brucehb·2016-03-11 01:00

[LeetCode20]Valid Parentheses

题目：Givenastringcontainingjustthecharacters '(', ')', '{', '}', '[' and ']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder, "()" and "()[]{}" areallvalidbut "(]" and "([)]" aren

zhangbaochong·2016-03-07 13:00

Different Ways to Add Parentheses

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

brucehb·2016-03-06 13:00

Longest Valid Parentheses HARD

Givenastringcontainingjustthecharacters '(' and ')',findthelengthofthelongestvalid(well-formed)parenthesessubstring.For "(()",thelongestvalidparenthesessubstringis "()",whichhaslength=2.Anotherexample

ArgenBarbie·2016-03-05 12:00

Generate Parentheses

遍历：注意左括号要在右括号前！1classSolution{ 2vectorres; 3public: 4voidset(intleft,intright,vector&result,stringstr) 5{ 6if(!left&&!right) 7result.push_back(str); 8if(left>0) 9set(left-1,right,result,str+'(

RenewDo·2016-03-03 20:00

leetcode - Remove Invalid Parentheses

题目：https://leetcode.com/problems/remove-invalid-parentheses/思路：广度优先遍历。在返回最终结果res前，注意去重！

bupt8846·2016-03-03 16:24

uva673 Parentheses Balance

括号匹配。就注意一点,cin原来是不读回车的.getline()可以将缓冲区的回车带走。importjava.util.*; importjava.io.*; importjava.math.*; publicclasspoj_1205{ publicstaticvoidmain(String[]args){ BigIntegerf[]=newBigInteger[110]; f[1]=BigI

yexiaohhjk·2016-03-03 15:00

Leetcode - Remove Invalid Parentheses

Screenshotfrom2016-03-0122:59:12.pngMycode:publicclassSolution{publicListremoveInvalidParentheses(Strings){ArrayListret=newArrayList();if(s==null||s.length()==0){ret.add("");returnret;}remove(0,0,newc

Richardo92·2016-03-02 12:22

Longest Valid Parentheses

32.LongestValidParentheses Problem'sLink ----------------------------------------------------------------------------Mean: 给定一个由'('和')'组成的字符串，求最长连续匹配子串长度.analyse:定义一个stack>类型的stack.遇到'('进栈;遇到')'需要分两种情

crazyacking·2016-03-01 21:00

Generate Parentheses

Given n pairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,given n =3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"AC代码：classSolution(object):

水果拼盘武士G·2016-02-29 23:00

leetcode第22题——**Generate Parentheses

题目Given n pairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,given n =3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"思路题目要求是给出一个数字n，要将n对括号可能形成的

buptlrw·2016-02-29 09:00

Valid Parentheses

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

水果拼盘武士G·2016-02-27 23:00

leetcode第20题——Valid Parentheses*

题目Givenastringcontainingjustthecharacters '(', ')', '{', '}', '[' and ']',determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder, "()" and "()[]{}" areallvalidbut "(]" and "([)]" areno

buptlrw·2016-02-27 11:00

[leetcode Q20] Valid Parentheses

题目要求检查括号字符串序列是否匹配简单的算法是使用一个栈：做一个空栈，顺序扫描字符串直到末尾如果读到开放符号“([{”则入栈否则读到“)]}”，检查栈是否为空，空则报错栈不空则检查栈顶元素是否与字符匹配扫描结束，检查栈是否为空，不空则报错cpp实现代码如下：boolisValid(strings){ stackhelpStack; size_ti=0; chartop; while(i!=s.si

u012675539·2016-02-26 17:00

Different Ways to Add Parentheses

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

KickCode·2016-02-26 08:31

【LeetCode OJ 20】Valid Parentheses

题目链接：https://leetcode.com/problems/valid-parentheses/题目：Givenastringcontainingjustthecharacters '(',

xujian_2014·2016-02-23 20:00

LeetCode Generate Parentheses

Given n pairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,given n =3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"思路分析：这题非常easy想到用DFS。转化成searc

mengfanrong·2016-02-20 16:00

Generate Parentheses

22.GenerateParenthesesProblem'sLink ----------------------------------------------------------------------------Mean: 给定一个数n，输出由2*n个'('和')'组成的字符串，该字符串符合括号匹配规则.analyse:递归求解.Timecomplexity:O(N) viewcod

crazyacking·2016-02-17 17:00

Valid Parentheses

20.ValidParentheses Problem'sLink ----------------------------------------------------------------------------Mean: 给定一个括号序列，检查括号是否按顺序匹配.analyse:栈结构的基本运用.Timecomplexity:O(N) viewcode/***--------------

crazyacking·2016-02-17 16:00

Generate Parentheses

Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,givenn=3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"这个问题解的个数为卡特兰数。不过这道题并不是求解的个数，而是将所

scutcoder·2016-02-13 22:00

A Calculator Supports Parentheses Written in C

Theflowchart ReadInput ->GetTokens->InfixToPostfix->Evaluate->OutputResultGetToken:Checkifthereissyntaxknowornot.InfixToPostfix:Checkifthereperenthesisbebalanceornot.Evaluate:Checkifthereisoperatoror

u013606170·2016-02-13 04:00

[LeetCode] Valid Parentheses

前言ValidParentheses是Leetcode的一道基础题，考察括号匹配算法，使用栈结构。题目题目描述Givenastringcontainingjustthecharacters‘(‘,‘)’,‘{‘,‘}’,‘[’and‘]’,determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,“()”and“(

AllZ·2016-02-07 09:33

[LeetCode] Valid Parentheses

前言ValidParentheses是Leetcode的一道基础题，考察括号匹配算法，使用栈结构。题目题目描述Givenastringcontainingjustthecharacters‘(‘,‘)’,‘{‘,‘}’,‘[’and‘]’,determineiftheinputstringisvalid.Thebracketsmustcloseinthecorrectorder,“()”and“(

allenzyoung·2016-02-07 09:00

Longest Valid Parentheses

Givenastringcontainingjustthecharacters '(' and ')',findthelengthofthelongestvalid(well-formed)parenthesessubstring.For "(()",thelongestvalidparenthesessubstringis "()",whichhaslength=2.Anotherexample

walkwalkwalk·2016-02-06 20:00

Different Ways to Add Parentheses （Python版）

题目：Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidoperatorsare+,-and*.大意是给定一个运算，求解所有运算序列的解例如Input:"2*3-4*5"(2*(3-(

温温wds·2016-02-06 18:45

Different Ways to Add Parentheses （Python版）

题目：Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidoperatorsare+, - and *.大意是给定一个运算，求解所有运算序列的解例如Input: "2*3-4*5"(2*

温温wds·2016-02-06 18:45

Generate Parentheses（构造）

题目大意：给n个'('和')'，构造出所有的长度为2*n并且有效的（可匹配的）字符串。题目分析：这道题不难，可以直接搜索出所有可能的字符串，然后再逐一判断是否合法即可。但是还有更好的办法，实际上，“判断是否合法”这一操作是冗余的，如果可以直接朝着满足可匹配性的方向进行构造，就可避免这一冗余操作，这需要换一个角度思考。一个有效（可匹配）字符串中， '(' 的个数决定了 ')' 的个数（从左向右看）。

20143605·2016-02-04 13:00

Generate Parentheses（构造）

题目大意：给n个'('和')'，构造出所有的长度为2*n并且有效的（可匹配的）字符串。题目分析：这道题不难，可以直接搜索出所有可能的字符串，然后再逐一判断是否合法即可。但是还有更好的办法，实际上，“判断是否合法”这一操作是冗余的，如果可以直接朝着满足可匹配性的方向进行构造，就可避免这一冗余操作，这需要换一个角度思考。一个有效（可匹配）字符串中， '(' 的个数决定了 ')' 的个数（从左向右看）。

20143605·2016-02-04 13:00

Generate Parentheses

Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,givenn=3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"递归生成判断l==n记录结果，当rresult; public:

偏爱纯白色·2016-02-04 13:00

Generate Parentheses

Givennpairsofparentheses,writeafunctiontogenerateallcombinationsofwell-formedparentheses.Forexample,givenn=3,asolutionsetis:"((()))","(()())","(())()","()(())","()()()"递归生成判断l==n记录结果，当rresult; public:

偏爱纯白色·2016-02-04 13:00

Longest Valid Parentheses

本来以为没必要用栈，代码如下：classSolution{ public: intlongestValidParentheses(strings){ intstack=0; intlength=0,max=0; for(inti=0;i0) { stack--; length+=2; if(length>max) max=length; } else length=0;

scutcoder·2016-02-03 23:00

Longest Valid Parentheses

本来以为没必要用栈，代码如下：classSolution{ public: intlongestValidParentheses(strings){ intstack=0; intlength=0,max=0; for(inti=0;i0) { stack--; length+=2; if(length>max) max=length; } else length=0;

scutcoder·2016-02-03 23:00

leetcode@ [241] Different Ways to Add Parentheses (Divide and Conquer)

https://leetcode.com/problems/different-ways-to-add-parentheses/Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidope

流白·2016-02-03 08:00

leetcode@ [241] Different Ways to Add Parentheses (Divide and Conquer)

https://leetcode.com/problems/different-ways-to-add-parentheses/Givenastringofnumbersandoperators,returnallpossibleresultsfromcomputingallthedifferentpossiblewaystogroupnumbersandoperators.Thevalidope

流白·2016-02-03 08:00

Leetcode - Longest Valid Parentheses

Screenshotfrom2016-02-0210:55:57.pngMycode:publicclassSolution{publicintlongestValidParentheses(Strings){if(s==null||s.length()=0;i--){intj=i+dp[i+1]+1;if(jss=newStack();intmaxLen=0;for(inti=0;i0&&dp[

Richardo92·2016-02-02 23:23

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