Flow Problem hdu 3549 网络流模板题目

Flow Problem

Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)
Total Submission(s): 6245    Accepted Submission(s): 2916

 

Problem Description

Network flow is a well-known difficult problem for ACMers. Given a graph, your task is to find out the maximum flow for the weighted directed graph.

Input

The first line of input contains an integer T, denoting the number of test cases.
For each test case, the first line contains two integers N and M, denoting the number of vertexes and edges in the graph. (2 <= N <= 15, 0 <= M <= 1000)
Next M lines, each line contains three integers X, Y and C, there is an edge from X to Y and the capacity of it is C. (1 <= X, Y <= N, 1 <= C <= 1000)

Output

For each test cases, you should output the maximum flow from source 1 to sink N.

Sample Input

2
3 2
1 2 1
2 3 1
3 3
1 2 1
2 3 1
1 3 1

Sample Output

Case 1: 1
Case 2: 2

Author

HyperHexagon

Source

HyperHexagon's Summer Gift (Original tasks)

直接套上然后改模板就是了

#include
#include
#include
#include
using namespace std;
#define M 0x3f3f3f3f
int n,m,map[300][300],flow[300][300],p[300],a[300];

int EK_max_flow(int s,int t)
{
    int sum=0;
    int i,j;
    queueq;
    memset(flow,0,sizeof(flow));
    while(true)//当找不出其他增广路线
    {

        memset(a,0,sizeof(a));//记住残余水量
        a[s]=M;
        q.push(s);
        while(!q.empty())
        {

            int u=q.front();
            q.pop();
            for(i=2;i<=m;i++)
            {
                if(!a[i]&&map[u][i]>flow[u][i])
                {
                    p[i]=u;
                    q.push(i);
                    a[i]=a[u]