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Re:高手看看我程序有啥问题,为什么总wa阿,不就是求最短路问题吗?

Posted by flymouse at 2008-04-10 03:47:25 on Problem 2394
In Reply To:高手看看我程序有啥问题,为什么总wa阿,不就是求最短路问题吗? Posted by:hotrhino at 2008-04-10 02:56:18
> #include<stdio.h>
> int main(){
> 	int ver[505][505];
> 	int MAX=1000000;
> 	int f,p,cow,timeS;
> 	scanf("%d%d%d%d",&f,&p,&cow,&timeS);
> 	int i,j,k;
> 	for (i=0; i<=f; i++)
> 		for (j=0; j<=f;j++)
> 			ver[i][j]=MAX;
> 	int tmp;
> 	for (k=0; k<p; k++){
> 			scanf("%d%d",&i,&j);
> 			scanf("%d",&tmp);
> 			if (tmp<ver[i][j]){
> 				ver[j][i]=tmp;
> 				ver[i][j]=tmp;
> 			}
> 	};
> 	for (k=1; k<=f;k++)
> 		for (i=1;i<=f; i++)
> 			for (j=1;j<=f; j++)
> 				if (ver[i][k]+ver[k][j]<ver[i][j])
> 					ver[i][j]=ver[i][k]+ver[k][j];
> 	for (k=1; k<=f; k++)
> 		ver[k][k]=MAX;
> 	int cowstr[500];
> 	int count=0;
> 	for (i=1; i<=cow; i++){
> 		scanf("%d",&cowstr[i]);
> 		if (ver[cowstr[i]][1]<=timeS)
> 			count++;
> 	}
> 	printf("%d\n",count);
> 	for (i=1; i<=cow; i++)
> 		if (ver[cowstr[i]][1]<=timeS)
> 			printf("%d\n",i);
> 	return 1;
> }
> 
> 	
不是多case?

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