Subsets：Given a set of distinct integers,S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The solution set mus...
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其他好文 时间：
2014-06-29 00:03:40
阅读次数：
272
项目中 需要大量数据的保存操作，每条执行save操作效率太低，在官网上找到bull_create 的批量存储方式，效率提高很多Insert in bulkWhen creating objects, where possible, use thebulk_create()method to redu...
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其他好文 时间：
2014-06-28 23:24:44
阅读次数：
594
题目：
Given a set of distinct integers, S, return all possible subsets.
Note:
Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets.
...
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其他好文 时间：
2014-06-22 17:51:54
阅读次数：
196
Write a function for retrieving the total number of substring palindromes.
For example the input is 'abba' then the possible palindromes= a, b, b, a, bb, abba
So the result is 6.
Updated at 11...
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其他好文 时间：
2014-06-21 23:59:42
阅读次数：
422
Letter Combinations of a Phone Number：Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit...
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移动开发 时间：
2014-06-21 00:56:16
阅读次数：
261
题目
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.
In...
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其他好文 时间：
2014-06-18 12:03:16
阅读次数：
227
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：
2014-06-18 11:41:52
阅读次数：
156
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the following unique perm...
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其他好文 时间：
2014-06-18 09:33:28
阅读次数：
181
Problem Description
You are given N positive integers, denoted as x0, x1 ... xN-1. Then give you some intervals [l, r]. For each interval, you need to find a number x to make
as small as possible!
...
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其他好文 时间：
2014-06-18 00:58:54
阅读次数：
276
Given a set of distinct integers,
S, return all possible subsets.
Note:
Elements in a subset must be in non-descending order.The solution set must not contain duplicate subsets.
For example,
...
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其他好文 时间：
2014-06-18 00:39:26
阅读次数：
301
