POJ 1719 Shooting Contest id=1719" target="_blank" style="">题目链接 题意:给定一个矩阵,每列有两个白点,其它都是黑点,如今要求每列选一个白点,使得每一行至少包括一个白点被选中 思路:二分图匹配,白点的位置行列建边,然后跑匹配,假设匹配数不等于行数,就是是无解,然后输出方案的时候注意,假设有位置是没匹配的,说明这个位置是多余的,可是还是要随意选一个白点来输出 代码: #include <…

http://poj.org/problem?id=1719 Shooting Contest Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4135   Accepted: 1521   Special Judge Description Welcome to the Annual Byteland Shooting Contest. Each competitor will shoot to a target whi…

Shooting Contest Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3812   Accepted: 1389   Special Judge Description Welcome to the Annual Byteland Shooting Contest. Each competitor will shoot to a target which is a rectangular grid. The t…

/* poj 2187 Beauty Contest 凸包:寻找每两点之间距离的最大值 这个最大值一定是在凸包的边缘上的! 求凸包的算法: Andrew算法! */ #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; struct Point{ Point(){} Point(int x, int y){ this->…

Shooting Contest Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 4097   Accepted: 1499   Special Judge Description Welcome to the Annual Byteland Shooting Contest. Each competitor will shoot to a target which is a rectangular grid. The t…

Description(下有中文题意) Welcome to the Annual Byteland Shooting Contest. Each competitor will shoot to a target which is a rectangular grid. The target consists of r*c squares located in r rows and c columns. The squares are coloured white or black. Ther…

POJ 3660 Cow Contest / HUST 1037 Cow Contest / HRBUST 1018 Cow Contest(图论,传递闭包) Description N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code better than others. Each cow has…

题目链接 把每一列能射的两行和这一列连边,然后跑一边匈牙利就行了. #include <cstdio> #include <cstring> #include <algorithm> using std::swap; #define Open(s) freopen(s".in","r",stdin);freopen(s".out","w",stdout); #define Close fcl…

链接:http://poj.org/problem?id=2187 Description Bessie, Farmer John's prize cow, has just won first place in a bovine beauty contest, earning the title 'Miss Cow World'. As a result, Bessie will make a tour of N (2 <= N <= 50,000) farms around the wor…

题目链接:http://poj.org/problem?id=3660 Cow Contest Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 10066   Accepted: 5682 Description N (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all kn…