标签：dijkstra   hdu   图论   最短路   

最短路

Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 42585    Accepted Submission(s): 18653

2 1
1 2 3
3 3
1 2 5
2 3 5
3 1 2
0 0

3
2

AC-code:

#include<cstdio>
#define max 0x3f3f3f3f
#define min(a,b) (a>b?b:a)
int n,dis[105],cost[105][105];
void dijkstra(int a)
{
	int i,vis[105];
	for(i=1;i<=n;i++)
	{
		dis[i]=max;
		vis[i]=0;
	}
	dis[a]=0;
	while(1)
	{
		int v=-1;
		for(i=1;i<=n;i++)
			if(!vis[i]&&(v==-1||dis[i]<dis[v]))
				v=i;
		if(v==-1)
			break;
		vis[v]=1;
		for(i=1;i<=n;i++)
			dis[i]=min(dis[i],dis[v]+cost[v][i]);
	}
}
int main()
{
	int m,i,j,a,b,c;
	while(scanf("%d%d",&n,&m),n||m)
	{
		for(i=1;i<=n;i++)
			for(j=1;j<=n;j++)
				cost[i][j]=max;
		for(i=1;i<=m;i++)
		{
			scanf("%d%d%d",&a,&b,&c);
			cost[a][b]=cost[b][a]=min(cost[a][b],c);	
		}
		dijkstra(1);
		printf("%d\n",dis[n]);
	}
	return 0;
}

HDU2544：最短路【Dijkstra】

标签：dijkstra   hdu   图论   最短路   

原文地址：http://blog.csdn.net/lin14543/article/details/47723125