题目：Given two integersnandk, return all possible combinations ofknumbers out of 1 ...n.For example,Ifn= 4 andk= 2, a solution is:[ [2,4], [3,4], [2,...
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其他好文 时间：
2015-07-07 18:42:12
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101
public class Solution { public List res; public StringBuilder seq; public List letterCombinations(String digits) { //本题类似于全排列的变形，全排列的每...
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其他好文 时间：
2015-07-07 14:28:47
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123
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:
“((()))”, “(()())”, “(())()”, “()(())”, “(...
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其他好文 时间：
2015-07-07 13:00:44
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105
Find all possible combinations of k numbers that add up to a number n, given that only numbers
from 1 to 9 can be used and each combination should be a unique set of numbers.
Ensure that numbers wi...
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其他好文 时间：
2015-07-07 11:07:18
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94
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:
"((()))", "(()())"...
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其他好文 时间：
2015-07-07 09:30:46
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106
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 number may be chosen from C unlimited number of t...
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其他好文 时间：
2015-07-06 21:45:12
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107
Given a digit string, return all possible letter combinations that the number could represent.
A mapping of digit to letters (just like on the telephone buttons) is given below.
Input:Digit st...
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其他好文 时间：
2015-07-04 14:02:10
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282
1. Question给一个数字字符串，按照电话上各个数字对应的字母，返回该字符串代表的所有可能的字母组合。Given a digit string, return all possible letter combinations that the number could represent.A ...
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其他好文 时间：
2015-07-03 23:23:10
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121
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:
"((()))", "(()())"...
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其他好文 时间：
2015-07-03 09:22:17
阅读次数：
142
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],
]...
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其他好文 时间：
2015-06-23 23:15:54
阅读次数：
132
