PuzzleA children's puzzle that was popular 30 years ago consisted of a 5x5 frame which contained 24 small squares of equal size. A unique letter of th...
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其他好文 时间:
2014-12-19 01:49:46
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283
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 number may be chosen from C unlimi...
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其他好文 时间:
2014-12-17 16:26:21
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170
题目描述:Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique l...
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其他好文 时间:
2014-12-17 16:10:40
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167
posted from http://www.sqlservergeeks.com/primary-key-and-unique-key-difference-in-sql-server/Primary and Unique Key both enforce uniqueness of column...
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数据库 时间:
2014-12-17 16:03:52
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181
【题目】
Given a collection of numbers that might contain duplicates, return all possible unique permutations.
For example,
[1,1,2] have the following unique permutations:
[1,1,2], [1,2,1],
an...
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其他好文 时间:
2014-12-17 12:49:36
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140
这道题承接Unique Binary Search Trees,只需要返回搜索二叉树的个数,用DP求解。但是这道题需要得到所有树的集合,可以用DFS求解。
原题是这个样子的:
Given n, generate all structurally unique BST's (binary search trees) that store values 1...n.
For example,
Given n = 3, your program should return all 5 unique BST's...
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其他好文 时间:
2014-12-17 00:23:26
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191
Combination Sum IIGiven a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sum...
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其他好文 时间:
2014-12-16 16:39:06
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264
【Combination Sum I】
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 cho...
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其他好文 时间:
2014-12-16 11:45:46
阅读次数:
186
排序操作排序是计算机承担的最基本操作之一,尤其是在数据库处理领域,oracle也不例外。可能需要oracle排序数据的操作包括以下几种;(1)创建一个索引(2)通过groupby,unique或distinct关键字对数据进行分组或聚合(3)因为使用orderby子句使得数据按照排好的顺序返回(4)..
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编程语言 时间:
2014-12-15 22:00:31
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387
SELECT CONCAT('alter table ', TABLE_NAME , ' drop foreign key ', constraint_name, ';')FROM information_schema.KEY_COLUMN_USAGE a WHERE a.TABLE_SCHEMA=...
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数据库 时间:
2014-12-15 15:15:29
阅读次数:
271