HDU 3790 -最短路径问题

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题目链接：最短路径问题

两个权值的最短路问题

SFPA +前向星 水过250ms

#include <iostream>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <queue>
const int INF = 1e7;
using namespace std;
int n,m,t;
int ma[1001][1001],dis[1001],cost[1001];
bool vis[1001];
struct node{
    int u,v,w, ww;
    int next;
}edge[100001];
int head[100001];
void init()
{
     memset(head,0,sizeof(head));
     for(int i = 1;i<=n;i++)
     {
            dis[i] = INF;
            cost[i] = INF;
            vis[i] = 0;
     }
     t = 1;
}
int s,e;

void add(int a,int b,int c,int d)
{
    edge[t].v = b;
    edge[t].w = c;
    edge[t].ww = d;
    edge[t].next = head[a];
    head[a] = t++;
}

void SPFA()
{
    queue<int>q;
    q.push(s);
    vis[s] = true;
    dis[s] = 0;
    cost[s] = 0;
   // int sum = 0;
    while(!q.empty())
    {
        int p = q.front();
      //  printf("%d",p);
        q.pop();
        vis[p] = 0;
        if(head[p])
        {

            for(int pp = head[p];pp!=0;pp = edge[pp].next)
            {
               // printf("->%d\n",edge[pp].v);
                if(dis[p] + edge[pp].w < dis[edge[pp].v])
                {
                    dis[edge[pp].v] = dis[p] + edge[pp].w ;
                    cost[edge[pp].v] = cost[p] + edge[pp].ww;
                  //  sum += edge[pp].ww;
                    if(!vis[edge[pp].v])
                   {
                    q.push(edge[pp].v);
                    vis[edge[pp].v] = true;
                  }
                }
                else if(dis[p] + edge[pp].w == dis[edge[pp].v])
                {
                    if(cost[edge[pp].v] > cost[p] + edge[pp].ww)
                    {
                        cost[edge[pp].v] = cost[p] + edge[pp].ww;
                    }
                }
             }
        }
    }
        printf("%d %d\n",dis[e],cost[e]);

}
int main()
{
    int a,b,c,d;
    while(scanf("%d%d",&n,&m)!=EOF)
    {
        if(n==0 && m==0) break ;

        init();

        for(int i = 0;i<m;i++)
        {
            scanf("%d%d%d%d",&a,&b,&c,&d);
            add(a,b,c,d);
            add(b,a,c,d);
        }
        scanf("%d%d",&s,&e);
        SPFA();
    }
    return 0;
}

HDU 3790 -最短路径问题,布布扣,bubuko.com

HDU 3790 -最短路径问题

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原文地址：http://blog.csdn.net/wjw0130/article/details/38235545