Description There are two rows of positive integer numbers. We can draw one line segment between any two equal numbers, with values r, if one of them is located in the first row and the other one is located in the second row. We call this line segmen…

Crossed Matchings Time Limit: 2 Seconds      Memory Limit: 65536 KB There are two rows of positive integer numbers. We can draw one line segment between any two equal numbers, with values r, if one of them is located in the first row and the other on…

Description In the two-player game "Two Ends", an even number of cards is laid out in a row. On each card, face up, is written a positive integer. Players take turns removing a card from either end of the row and placing the card in their pile.…

Description There are two rows of positive integer numbers. We can draw one line segment between any two equal numbers, with values r, if one of them is located in the first row and the other one is located in the second row. We call this line segmen…

Time Limit: 1000MS     Memory Limit: 10000K Total Submissions: 2738   Accepted: 1777 Description There are two rows of positive integer numbers. We can draw one line segment between any two equal numbers, with values r, if one of them is located in t…

http://poj.org/problem?id=1692 这题看完题后就觉得我肯定不会的了,但是题解却很好理解.- - ,做题阴影吗 所以我还是需要多思考. 题目是给定两个数组,要求找出最大匹配数量. 匹配规则是: a[i] ==b[j],而且需要产生交叉,而且没对数只能匹配一次. 一开始的时候我被交叉吓到了,怎么判断交叉啊? 分析: 对于a[]的第i个数,b数组的第j个数,假设a[i] != b[j] 如果它能产生匹配,那么就需要, 对于a[i]这个数字,在b[]的前j - 1个找到和他数…

题意 机器调度问题 有两个机器A,B A有n种工作模式0...n-1 B有m种工作模式0...m-1 然后又k个任务要做 每一个任务能够用A机器的模式i或b机器的模式j来完毕 机器開始都处于模式0 每次换模式时都要重新启动 问完毕全部任务机器至少重新启动多少次 最基础的二分图最大匹配问题 对于每一个任务把i和j之间连一条边就能够构成一个二分图 那么每一个任务都能够相应一条边 那么如今就是要找最少的点 使这些点能覆盖全部的边 即点覆盖数 又由于二分图的点覆盖数 = 匹配数 那么就是裸的求二分图最大…

一般图最大匹配带花树: 建图后,计算最大匹配数. 假设有一个联通块不是完美匹配,先手就能够走那个没被匹配到的点.后手不论怎么走,都必定走到一个被匹配的点上.先手就能够顺着这个交错路走下去,最后一定是后手没有路可走,由于假设还有路可走,这一条交错路,就是一个增广路,必定有更大的匹配. Game Time Limit: 1 Second      Memory Limit: 32768 KB Fire and Lam are addicted to the game of Go recently.…

Very often, especially in programming contests, we treat a sequence of non-whitespace characters as a string. But sometimes, a string may contain whitespace characters or even be empty. We can have such strings quoted and escaped to handle these case…

The vast power system is the most complicated man-made system and the greatest engineering innovation in the 20th century. The following diagram shows a typical 14 bus power system. In real world, the power system may contains hundreds of buses and t…