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这个题目为什么FLOYD也过不了啊?快哭了,谢谢各位大牛帮忙看看!!!

Posted by wangfengbo at 2008-05-24 11:02:35 on Problem 1122
Source Code

Problem: 1122  User: wangfengbo 
Memory: N/A  Time: N/A 
Language: G++  Result: Wrong Answer 

Source Code 
#include <iostream>
#include <sstream>
#include <cstdlib>

using namespace std;

struct tt
{
	int begin,time;
}start[21];

int map[21][21];
int path[21][21]={0};
int cmp(const void *a,const void *b)
{
	tt *c,*d;
	c = (tt*)a;
	d = (tt*)b;
	return c->time - d->time;
}

void pathprint(int index,int dest)
{
	int temp;
	if(index == dest)
	{
		printf("%d",index);
		return ;
	}
	if(dest == 0)
		printf("%d\t",index);
	else
	{
		if(index == 0)
			printf("%d\t",dest);
		else
		{
			temp = path[index][dest];
			if(temp == 0)
				printf("%d\t%d\t",index,dest);
			else
			{
				pathprint(index,path[index][temp]);
				printf("%d\t",temp);
				pathprint(path[index][temp],dest);
			}
		}
	}
}

int main()
{
	stringstream ss;
	int i,j,k,n,des,fire,temp;
	char s[100],ch;
	//freopen("in.txt","r",stdin);
	scanf("%d",&n);
	for(i=1;i<=n;i++)
	{
		for(j=1;j<=n;j++)
		{
			scanf("%d",&map[i][j]);
			if(map[i][j] == -1)
				map[i][j] = 1000000;
		}
	}
	while(ch=getchar(),ch!='\n');
	gets(s);
	ss<<s;
	ss>>des;
	i=0;
	while(ss>>temp)
		start[i++].begin=temp;
	fire = i;
	//floyd
	for(k=1;k<=n;k++)
	{
		for(i=1;i<=n;i++)
		{
			for(j=1;j<=n;j++)
			{
				if(map[i][j] > (temp = map[i][k]+map[k][j]))
				{
					map[i][j] = temp;
					path[i][j]=k;
				}
			}
		}
	}

	for(i=0;i<fire;i++)
		start[i].time = map[start[i].begin][des];
	qsort(start,fire,sizeof(start[0]),cmp);
	printf("Org\tDest\tTime\tPath\n");
	for(i=0;i<fire;i++)
	{
		printf("%d\t%d\t%d\t",start[i].begin,des,start[i].time);
		pathprint(start[i].begin,des);
		printf("\n");
	}
	printf("\n");
	return 0;
}





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