比赛 20110414pm 评测结果 ATWWWWWWTT
题目名称 龙凡 最终得分 10
用户昵称 .Xmz 运行时间 0.000 s
代码语言 C++ 内存使用 0.00 MiB
提交时间 2011-04-14 15:35:15
显示代码纯文本
#include <iostream>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <queue>

using namespace std;
const int maxm=444444;
const int maxn=111111;
const int oo=2000000000;

struct edge
{
	int t,c;
	edge *next;
}E[maxm],*V[maxn];
int eh,n;

inline void addedge(int a,int b,int c)
{
	E[++eh].next=V[a]; V[a]=E+eh; V[a]->t=b;  V[a]->c=c;
	E[++eh].next=V[b]; V[b]=E+eh; V[b]->t=a;  V[b]->c=c;
}

void init()
{
	int m,a,b,c;
	scanf("%d%d",&n,&m);
	for (;m>0;--m)
	{
		scanf("%d%d%d",&a,&b,&c);
		addedge(a,b,c);
	}
}

queue <int> Q;
bool inq[maxn];
int d[maxn],ans[maxn];
void solve()
{
	Q.push(1);
	inq[1]=true;
	for (int i=1;i<=n;i++) d[i]=oo;
	d[1]=0;
	while (Q.size())
	{
		int u=Q.front();
		Q.pop();inq[u]=false;
		for (edge *e=V[u];e;e=e->next)
		{
			if (d[e->t]>d[u]+e->c)
			{
				d[e->t]=d[u]+e->c;
				if (!inq[e->t])
				{
					inq[e->t]=true;
					Q.push(e->t);
				}
			}
		}
	}
	for (int i=1;i<=n;i++) ans[i]=oo;
	for (int u=1;u<=n;u++)
	for (edge *e=V[u];e;e=e->next)
	if (d[u]+e->c>d[e->t] && d[u]+e->c<ans[e->t])
	{
		ans[e->t]=d[u]+e->c;
	}
	for (int i=2;i<=n;i++)
	{
		if (ans[i]==oo) ans[i]=-1;
		printf("%d\n",ans[i]);
	}
}

int main()
{
	freopen("travel.in","r",stdin);
	freopen("travel.out","w",stdout);
	init();
	solve();
	return 0;
}