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Longest Valid Parentheses
Given a string containing just the characters '(' and ')', find the length of the longest valid (well-formed) parentheses substring. For "(()", the longest valid parentheses substring is "()", ...
分类:其他好文   时间:2015-04-02 11:40:03    阅读次数:114
No.22 Generate Parentheses
No.22 Generate ParenthesesGivennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3,...
分类:其他好文   时间:2015-04-01 17:21:55    阅读次数:97
Generate Parentheses
Given n pairs of parentheses, write a function to generate all combinations of well-formed parentheses. For example, given n = 3, a solution set is: "((()))", "(()())", "(())()", "()(())", "()()()...
分类:其他好文   时间:2015-04-01 11:25:47    阅读次数:110
Valid Parentheses
有一个由各种括号组成的字符串,判断其是否合法 合法准则即是否成对匹配(())合法({])不合法())(不合法思路:用栈模拟即可 class Solution {public: bool isValid(string s) { stack stk; for (size_t i = 0; i < s.s...
分类:其他好文   时间:2015-04-01 11:00:27    阅读次数:82
Pascal's Triangle
GivennumRows, generate the firstnumRowsof Pascal's triangle.For example, givennumRows= 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]...
分类:其他好文   时间:2015-03-30 10:51:47    阅读次数:104
[LeetCode 46 & 47] Permutations I & II
题目链接:permutations 相似题型: 1.  [LeetCode 39&40] Combination Sum I & II 2. [LeetCode 78] Subsets 3.  [LeetCode 90] Subsets II 4. [LeetCode 22] Generate Parentheses 5.  [LeetCod...
分类:其他好文   时间:2015-03-30 09:39:01    阅读次数:165
Sicily 9456. Clumsy Cows
9456. Clumsy Cows Constraints Time Limit: 1 secs, Memory Limit: 256 MB Description Bessie the cow is trying to type a balanced string of parentheses into her new laptop, but she is s...
分类:其他好文   时间:2015-03-30 09:22:36    阅读次数:179
【SICP练习】143 练习3.81
练习3-81原文“random” numbers. Produce a stream formulation of this same generator that operates on an input stream of requests to generate a new random number or to reset the sequence to a specified value...
分类:其他好文   时间:2015-03-29 16:37:04    阅读次数:151
Leetcode: Fraction to Recurring Decimal
题目: Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.If the fractional part is repeating, enclose the repeating part in parentheses.For...
分类:其他好文   时间:2015-03-29 16:36:10    阅读次数:144
[LeetCode 77] Combinations
题目链接:combinations 相似题型: 1.  [LeetCode 39&40] Combination Sum I & II 2. [LeetCode 78] Subsets 3.  [LeetCode 90] Subsets II 4. [LeetCode 22] Generate Parentheses import java.util.A...
分类:其他好文   时间:2015-03-29 15:09:43    阅读次数:153
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