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mysql问题解决
SELECT?a.Pid,a.id?FROM?`user`?as?b,`reward`?as?a?WHERE?b.id=4?and?a.Pid?=?b.Pid; 在执行上面语句是报错:Illegal mix of collations (ucs2_general_ci,IMPLICIT) and (utf8_general_ci,IMPLICI...
分类:数据库   时间:2014-07-21 10:33:24    阅读次数:235
【leetcode】Clone Graph
Clone an undirected graph. Each node in the graph contains alabeland a list of itsneighbors.OJ's undirected graph serialization:Nodes are labeled uniq...
分类:其他好文   时间:2014-07-19 12:11:53    阅读次数:238
UVA Graph Coloring
题目如下: Graph Coloring  You are to write a program that tries to find an optimal coloring for agiven graph. Colors are applied to the nodes of the graph and the only availablec...
分类:其他好文   时间:2014-07-19 02:35:06    阅读次数:210
UVA Bandwidth
题目如下: Bandwidth  Given a graph (V,E) where V is a set of nodes and E is a set of arcsin VxV, and an ordering on the elements in V, then the bandwidth of a node v is defined as...
分类:其他好文   时间:2014-07-19 02:26:15    阅读次数:206
[LeetCode] Clone Graph
Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors.OJ's undirected graph serialization:Nodes are labeled u...
分类:其他好文   时间:2014-07-19 00:05:00    阅读次数:201
【leetcode】Clone Graph(python)
类似于二叉树的三种遍历,我们可以基于遍历的模板做很多额外的事情,图的两种遍历,深度和广度模板同样也可以做很多额外的事情,这里举例利用深度优先遍历的模板来进行复制,深度优先中,我们先访问第一个结点,接着访问第一个邻接点,再访问邻节点的邻节点。。。。 class Solution: # @param node, a undirected graph node # @return a ...
分类:编程语言   时间:2014-07-18 23:11:00    阅读次数:331
HDU 3435A new Graph Game(网络流之最小费用流)
题目地址:HDU 3435 这题刚上来一看,感觉毫无头绪。。再仔细想想。。发现跟我做的前两道费用流的题是差不多的。可以往那上面转换。 建图基本差不多,只不过这里是无向图。建图依然是拆点,判断入度出度,最后判断是否满流,满流的话这时的费用流是符合要求的,输出,不能满流的话,输出NO。 代码如下: #include #include #include #include #include...
分类:其他好文   时间:2014-07-18 21:28:17    阅读次数:193
执行shell脚本遇到错误syntax error: unexpected "then" (expecting "}")
今天执行脚本的时候遇到错误,如下图:root@ApFree:/usr/sbin# ./conntrack_num_graph.sh ./conntrack_num_graph.sh: line 9: syntax error: unexpected "then" (expecting "}")roo...
分类:其他好文   时间:2014-07-18 12:04:31    阅读次数:554
数据结构:图论基础
图概述 图(Graph)是一种比线性结构和树形结构都要复杂的数据结构。简单讲,图是由表示数据元素的的集合V和表示数据之间关系的集合E组成。其中,数据元素常称作顶点(vertex),数据之间的关系常称作边(edge)。故图可记为G=,其中V是顶点的有穷非空集合,E是边的集合。在图中顶点的前驱和后继是不设限制的,因此图描述的是一种网状关系。 无向图 若边是无序的或者说是无向的,则称此图是无向图。若无向图中有边(v1,v2)(无向图中边用圆括号表示),则显然(v2,v1)和(v1,v2)是同一条边。...
分类:其他好文   时间:2014-07-18 11:02:46    阅读次数:278
HDU - 1845 Jimmy’s Assignment (二分匹配)
Description Jimmy is studying Advanced Graph Algorithms at his university. His most recent assignment is to find a maximum matching in a special kind of graph. This graph is undirected, has N verti...
分类:其他好文   时间:2014-07-16 14:34:42    阅读次数:239
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