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poj 1679 The Unique MST (判断最小生成树是否唯一)
题意:判断最小生成树是否唯一, 若唯一,输出最小权值和,否则,输出 Not Unique! 判断最小生成树是否唯一的思路: 1、对图中的每一条边,扫描其他边,如果存在相同权值的边,则对该边做标记 2、然后用Kruskal算法或Prim算法求MST 3、求得MST后,如果该MST中未包含做了标记的边,即可判断MST唯一; 如果包含做了标记的边,则依次去掉这些边的一条边,再求MST, 如果求得的MST权值和原来的MST的权值一样,即可判断MST不唯一。...
分类:其他好文   时间:2014-11-17 17:51:02    阅读次数:165
Unique Binary Search Trees
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. 1.....
分类:其他好文   时间:2014-11-17 13:56:57    阅读次数:141
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:2014-11-17 12:13:51    阅读次数:184
java生成UUID
UUID含义是通用唯一识别码 (Universally Unique Identifier),这 是一个软件建构的标准,也是被开源软件基金会 (Open Software Foundation, OSF) 的组织在分布式计算环境 (Distributed Computing Environment,...
分类:编程语言   时间:2014-11-17 12:08:57    阅读次数:282
Leetcode-Unique Paths II
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i...
分类:其他好文   时间:2014-11-17 06:53:34    阅读次数:138
Leetcode-Permuation 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 ...
分类:其他好文   时间:2014-11-17 06:53:34    阅读次数:214
Leetcode-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 po...
分类:其他好文   时间:2014-11-17 06:51:30    阅读次数:164
matlab中怎样删除重复元素使得和Python中集合set的功能一样
1 >> m=[1,1,2,2,3]; 2 >> m 3 4 m = 5 6 1 1 2 2 3 7 8 >> b=unique(m) 9 10 b =11 12 1 2 3使用unique函数;从而去掉重复元素,统计出现的...
分类:编程语言   时间:2014-11-16 21:33:43    阅读次数:181
[Bhatia.Matrix Analysis.Solutions to Exercises and Problems]ExI.1.1
Given any $k$-tupel of linearly independent vectors $X$ as above, there exists a $k$-tuple $Y$ biorthognal to it. If $k=n$, this $Y$ is unique. \eex$$...
分类:其他好文   时间:2014-11-16 12:02:08    阅读次数:151
[leetcode]3Sum
问题描述: 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...
分类:其他好文   时间:2014-11-15 23:19:27    阅读次数:347
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