<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[Space_midtree的专栏]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/Space_midtree</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; Space_midtree]]></copyright><item><title><![CDATA[USACO Section 4.4 Pollutant Control]]></title><link>https://blog.youkuaiyun.com/Space_midtree/article/details/5686836</link><guid>https://blog.youkuaiyun.com/Space_midtree/article/details/5686836</guid><author>Space_midtree</author><pubDate>Tue, 22 Jun 2010 16:18:00 +0800</pubDate><description><![CDATA[<br />标签：网络流 最大流 最小割<br /> <br />以损失为边权求最大流，最大流的值也就是停车最小的损失（最小割）<br />1、先求出最大流。<br />2、将所有边进行排序：先按边权从大到小排，边权相等则按出现顺序从先到后排。<br />3、尝试删去每一条边，若删去后最大流减小值 = 该边边权，说明它是最小割集的元素。否则把边还原<br /> <br />由于按边权大小排过序，所以在求最小割的时候能保证每次找到汇集最大的边，而不是那些分流。这样能保证数目最小。]]></description><category></category></item><item><title><![CDATA[USACO Section 4.4 Shuttle Puzzle]]></title><link>https://blog.youkuaiyun.com/Space_midtree/article/details/5685198</link><guid>https://blog.youkuaiyun.com/Space_midtree/article/details/5685198</guid><author>Space_midtree</author><pubDate>Tue, 22 Jun 2010 02:39:00 +0800</pubDate><description><![CDATA[开始看的时候觉得是宽搜，后来发现状态量太大了。看了一下Sample感觉有规律n = 4WWWW□BBBBWWW□WBBBBWWWBW□BBBWWWBWB□BBWWWB□BWBBWW□BWBWBBW□WBWBWBBWBW□WBWBBWBWBW□WBBWBWBWBW□BWBWBWBWB□WBWBWB□BWWBWB□BWBWWB□BWBWBW□BWBWBWBWB□WBWBWBWBBW□WBWBWBBWBW□WBWBBWBWBW□WBBWBWB□WWBBWB□BWWWBB□BWBWWWBBB□WBWWWBBBBW□]]></description><category></category></item><item><title><![CDATA[USACO Section 4.3 Letter Game ]]></title><link>https://blog.youkuaiyun.com/Space_midtree/article/details/5684825</link><guid>https://blog.youkuaiyun.com/Space_midtree/article/details/5684825</guid><author>Space_midtree</author><pubDate>Mon, 21 Jun 2010 21:39:00 +0800</pubDate><description><![CDATA[<br />把所有可能的排列情况枚举出来，再对每种情况枚举断点，trie树查找<br />最近晕晕的，strcmp写成strcpy。得调整好状态哟]]></description><category></category></item><item><title><![CDATA[Set here to write reports]]></title><link>https://blog.youkuaiyun.com/Space_midtree/article/details/5684698</link><guid>https://blog.youkuaiyun.com/Space_midtree/article/details/5684698</guid><author>Space_midtree</author><pubDate>Mon, 21 Jun 2010 19:58:00 +0800</pubDate><description><![CDATA[切题切了有一段时间了，很少写解题报告，这样不好，所以得培养一下写报告的习惯，所以这篇标志性的文章诞生了，预示着未来一大坨解题报告的诞生]]></description><category></category></item></channel></rss>