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LeetCode 59 Permutation Sequence
The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, We get the following sequence (ie, for n = 3): "123""132""213""231""3...
分类:其他好文   时间:2014-08-28 21:15:29    阅读次数:232
LeetCode 46 Permutations II
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], and [2,1,1]. ...
分类:其他好文   时间:2014-08-28 14:51:19    阅读次数:148
3Sum
Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: Elements in a triplet (a,b,c...
分类:其他好文   时间:2014-08-28 13:22:49    阅读次数:177
ORA-00001: unique constraint (...) violated并不一定是数据冲突
遇到这种情况,重建完表和索引后,终于正常INSERT了。
分类:其他好文   时间:2014-08-28 12:53:49    阅读次数:157
leetcode 之 Permutation Sequence
Permutation Sequence The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, We get the following sequence (ie, for n = 3):...
分类:其他好文   时间:2014-08-28 11:30:09    阅读次数:231
Permutations II
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2] have the following unique per...
分类:其他好文   时间:2014-08-27 21:55:38    阅读次数:242
41. Unique Binary Search Trees && Unique Binary Search Trees II
思路: f(n) = Σi=1n f(n-i)*f(i-1), 其中 f(0) = f(1) = 1; 利用动归记下之前的 f(2)~f(n-1)即可。 思路:分别以 1~n 为根节点,左右子树根的集合数量相乘,递归,依次得出结果。
分类:其他好文   时间:2014-08-27 20:22:28    阅读次数:278
leetcode 之 Unique Paths
Unique Paths A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The r...
分类:其他好文   时间:2014-08-27 16:34:58    阅读次数:242
Permutations II <LeetCode>
Given a collection of numbers that might contain duplicates, return all possible unique permutations.For example,[1,1,2]have the following unique perm...
分类:其他好文   时间:2014-08-27 01:37:16    阅读次数:242
SQL SERVER 2005 获取表的所有索引信息以及删除和新建语句
BEGINWITHtxAS(SELECTa.object_id,b.nameASschema_name,a.nameAStable_name,c.nameasix_name,c.is_uniqueASix_unique,c.type_descASix_type_desc,d.index_column...
分类:数据库   时间:2014-08-26 21:27:06    阅读次数:368
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