hdu 1150 Machine Schedule(二分图模板题)

题目大意:有两台机器A和B,A机器有n种工作方式,B机器有m种工作方式。共有k个任务。每个任务恰好在一条机器上运行。

如果任务在A机器上运行,就需要转换为模式Xi,如果在B机器上运行,就需要转换为模式Yi

每台机器上的任务可以按照任意顺序执行,但是每台机器每转换一次模式需要重启一次。

请合理为每个任务安排一台机器并合理安排顺序,使得机器重启次数尽量少。

邻接矩阵

#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

const int maxn=111;

int n,m,k;
int g[maxn][maxn];
int linker[maxn];
bool used[maxn];

bool dfs(int u)
{
    for(int v=1;v<=m;v++)
    {
        if(g[u][v]&&used[v]==false)
        {
            used[v]=true;
            if(linker[v]==-1||dfs(linker[v]))
            {
                linker[v]=u;
                return true;
            }
        }
    }
    return false;
}

int hungary()
{
    int res=0;
    memset(linker,-1,sizeof(linker));
    for(int u=1;u<=n;u++)
    {
        memset(used,false,sizeof(used));
        if(dfs(u)) res++;
    }
    return res;
}

int main()
{
    while(scanf("%d",&n),n!=0)
    {
        memset(g,0,sizeof(g));
        scanf("%d%d",&m,&k);
        while(k--)
        {
            int i,u,v;
            scanf("%d%d%d",&i,&u,&v);
            g[u][v]=1;
        }
        cout<<hungary()<<endl;
    }
    return 0;
}

原文地址:https://www.cnblogs.com/Fy1999/p/9669996.html

时间: 2024-12-12 05:55:24

hdu 1150 Machine Schedule(二分图模板题)的相关文章

hdu 1150 Machine Schedule(二分图-最小顶点覆盖)

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 5424    Accepted Submission(s): 2691 Problem Description As we all know, machine scheduling is a very classical problem in compu

hdu - 1150 Machine Schedule (二分图匹配最小点覆盖)

http://acm.hdu.edu.cn/showproblem.php?pid=1150 有两种机器,A机器有n种模式,B机器有m种模式,现在有k个任务需要执行,没切换一个任务机器就需要重启一次, 如果任务i在机器A上执行,A机器需要一个对应的模式A,如果在机器B上执行,机器A需要一个模式B. 一直就是机器A在切换模式,现在让你安排一种合理的任务执行顺序,让机器重启次数最少. 每个任务之间连一条边.二分图的最小顶点覆盖就是求最少的点可以连接所有的边,然后转化成最大匹配即可. 这题就是初始状态

hdu 1150 Machine Schedule (二分图匹配)

#include<cstdio> #include<cstring> #include<iostream> #include<algorithm> using namespace std; int n,m,k; int mat[110][110]; int link[110]; int vis[110]; bool find(int u) { int v; for(v=0;v<m;j++) if(g[u][v]&&!vis[v]) {

hdu 1150 Machine Schedule(二分匹配,简单匈牙利算法)

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1150 Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6733    Accepted Submission(s): 3375 Problem Description As we all know, mach

hdu 1150 Machine Schedule(最小顶点覆盖)

pid=1150">Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 5424    Accepted Submission(s): 2691 Problem Description As we all know, machine scheduling is a very classical pro

hdu 1150 Machine Schedule 最少点覆盖转化为最大匹配

Machine Schedule Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1150 Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history.

hdu 1150 Machine Schedule 最少点覆盖

Machine Schedule Time Limit: 1 Sec  Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1150 Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history.

HDU 1150 Machine Schedule (二分匹配)

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long history. Scheduli

HDU——1150 Machine Schedule

Machine Schedule Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 9461    Accepted Submission(s): 4755 Problem Description As we all know, machine scheduling is a very classical problem in compu