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sql学习总结(2)——数据库表技术
2.1创建数据库表use db_databaseckcreate table 职工(职工编号 int identity(1,1) primary key,职工号 varchar(50) unique,仓库号 varchar(50),基本工资 int check(基本工资>=800 and基本工资<....
分类:数据库   时间:2015-03-15 13:53:08    阅读次数:131
LeetCode --- 60. Permutation Sequence
题目链接: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:2015-03-15 00:54:34    阅读次数:150
Unique Binary Search Trees
/* 卡特兰数,只记得递推公式, h(n) = h(n-1)*(4*n-2)/(n+1), h(n) = C(2*n,n)/(n+1), h(n) = C(2*n,n) - C(2*n,n+1);*/class Solution {public: int C(int n...
分类:其他好文   时间:2015-03-14 16:39:15    阅读次数:123
Tutorial
What isρ(s,?t)equal to? For every character ofsand every character oftthere is a unique cyclic shift oftthat superposes these characters (indeed, afte...
分类:其他好文   时间:2015-03-13 20:42:28    阅读次数:120
3Sum
3Sum问题: Given an arraySofnintegers, are there elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which gives the sum of zero.思路....
分类:其他好文   时间:2015-03-13 17:57:50    阅读次数:163
leetcode_96_Unique Binary Search Trees
欢迎大家阅读参考,如有错误或疑问请留言纠正,谢谢 96 Unique Binary Search Trees Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, there are a tota...
分类:其他好文   时间:2015-03-13 09:23:00    阅读次数:114
leetcode_95_Unique Binary Search Trees II
欢迎大家阅读参考,如有错误或疑问请留言纠正,谢谢 95 Unique Binary Search Trees II Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example, Given n = 3, your ...
分类:其他好文   时间:2015-03-13 09:20:50    阅读次数:109
Unique Binary Search Trees
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?简单动态规划。判别每个左右子树各有多少种情况,然后相乘就可以了,而且是BST,注意这条件就可以解了。它的状态转移方程为: .....
分类:其他好文   时间:2015-03-13 00:07:39    阅读次数:151
【leetcode】Unique Paths
A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right at any point ...
分类:其他好文   时间:2015-03-12 22:05:04    阅读次数:148
Unique Paths II
Unique Paths II问题:Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle...
分类:其他好文   时间:2015-03-12 18:47:56    阅读次数:181
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