題目鏈接 題意 :N个部门和N个员工,每个部门要雇佣一个工人,部门对每个工人打分,从1~N,1表示很想要,N表示特别不想要,每个工人对部门打分,从1~N.1表示很想去这个部门,N表示特别不想去这个部门,求一个匹配,使每个人的希望值最大. 思路 :KM算法.资料.用深搜构造所有能达到最大值的匹配情况.参考 #include <stdio.h> #include <string.h> #include <iostream> using namespace std ; ; i…

题意:n个老板n个员工,先给你n*n的数据,i行j列代表第i个老板第j喜欢的员工是谁,再给你n*n的数据,i行j列代表第i个员工第j喜欢的老板是谁,如果匹配到第k喜欢的人就会产生一个分数k-1.现在让你给老板和员工配对,希望得到的分数的平均数最少,并给出哪个老板匹配哪个员工,多种情况按字典序输出. 思路:题目中的input提示是错的... 这题就是km最大权值匹配的裸题,分数最小那就把权值变负,然后跑出最少的总分.因为n比较小,可以dfs求出所有情况. 代码: #include<set> #i…

[POJ 2400] Supervisor, Supervisee(KM求最小权匹配) Supervisor, Supervisee Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2538   Accepted: 719 Description Suppose some supervisors each get to hire a new person for their department. There are N…

Sorting Slides Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 2831   Accepted: 1076 Description Professor Clumsey is going to give an important talk this afternoon. Unfortunately, he is not a very tidy person and has put all his transpa…

POJ 3669 Meteor Shower(流星雨) Time Limit: 1000MS    Memory Limit: 65536K Description 题目描述 Bessie hears that an extraordinary meteor shower is coming; reports say that these meteors will crash into earth and destroy anything they hit. Anxious for her sa…

POJ 3253 Fence Repair (优先队列) Farmer John wants to repair a small length of the fence around the pasture. He measures the fence and finds that he needsN (1 ≤ N ≤ 20,000) planks of wood, each having some integer lengthLi (1 ≤ Li ≤ 50,000) units. He the…

[POJ 3071] Football(DP) Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4350   Accepted: 2222 Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, -, 2n. In each round of the tournament, all tea…

Poj 3613 Cow Relays (图论) 题目大意 给出一个无向图,T条边,给出N,S,E,求S到E经过N条边的最短路径长度 理论上讲就是给了有n条边限制的最短路 solution 最一开始想到是的去直接统计最短路经过了多少条边,结果,,, 还是太年轻了... 不过,看数据范围只有1000,那么floyd是首选 回顾Floyd算法流程,其中的i到j松弛操作是通过k完成的 那么松弛一次就利用一个k点,我现在要经过n条边,那么松弛n次即可 详细说就是更新一次之后,把f[i][j]拷贝到原来的…

D - Jungle Roads Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1251 Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extr…

Primitive Roots http://poj.org/problem?id=1284 Time Limit: 1000MS   Memory Limit: 10000K       Description We say that integer x, 0 < x < p, is a primitive root modulo odd prime p if and only if the set { (xi mod p) | 1 <= i <= p-1 } is equal…