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LeetCode: Generate Parentheses
Title:Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"...
分类:其他好文   时间:2015-04-14 15:59:58    阅读次数:104
Generate Parentheses——LeetCode
Givennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, a solution set is:"((()))...
分类:其他好文   时间:2015-04-13 22:18:17    阅读次数:102
Leetcode: Generate Parentheses
题目: 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:2015-04-13 20:54:32    阅读次数:121
Combinations -- leetcode
Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example, If n = 4 and k = 2, a solution is: [ [2,4], [3,4], [2,3], [1,2], [1,3], [1,4], ]...
分类:其他好文   时间:2015-04-13 16:52:09    阅读次数:116
LeetCode: Letter Combinations of a Phone Number
Title:Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the te...
分类:其他好文   时间:2015-04-13 09:24:58    阅读次数:142
[LeetCode] Combination Sum II 组合之和之二
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Each number ...
分类:其他好文   时间:2015-04-12 14:34:35    阅读次数:122
LeetCode39/40/79 Combination SumI/II /Word Search--backtracking**
一: LeetCode39 Combination Sum 题目: Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated nu...
分类:其他好文   时间:2015-04-12 13:28:04    阅读次数:190
[LeetCode] Combination Sum 组合之和
Given a set of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Thesamerepeated num...
分类:其他好文   时间:2015-04-12 13:13:58    阅读次数:122
leetcode || 77、Combinations
problem: Given two integers n and k, return all possible combinations of k numbers out of 1 ... n. For example, If n = 4 and k = 2, a solution is: [ [2,4], [3,4], [2,3], [1,2],...
分类:其他好文   时间:2015-04-10 09:32:46    阅读次数:148
leetcode_Letter Combinations of a Phone Number
思路: 本题目要实现的效果就是产生一系列广义有序的字符串序列,本来想假如知道digits字符串长度的话,可以搞一个n层循环,但是digits的长度是未知的。想了好久,想到了用递归来实现本题目要实现的功能,每个数字循环到数字所代表字符的个数大小时,返回上一级递归,然后再在上一级的循环层次计数上再加1即可。 当字符的长度等于digits的长度时,说明已经产生一组有效的字符串,存储起来,然后将最后一个字符删除,继续循环。。。。 最后,当index<0时,说明整个循环已经结束,over!但是在具体实现的过程中,递...
分类:其他好文   时间:2015-04-09 21:55:57    阅读次数:130
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