93 lines
2.0 KiB
C++
93 lines
2.0 KiB
C++
#include<cstdio>
|
|
#include<cstring>
|
|
#include<iostream>
|
|
#include<queue>
|
|
using namespace std ;
|
|
const int maxn = 100010 ;
|
|
const int inf = 0x3f3f3f3f ;
|
|
struct Edge
|
|
{
|
|
int v ;int w ;
|
|
int next ;
|
|
}edge[maxn*10] ;
|
|
int head[maxn] ;
|
|
int dis[20][maxn] ;
|
|
int vis[maxn] ;
|
|
int nedge ;int a[maxn] ,num;
|
|
int n , m ;
|
|
void addedge(int u , int v , int w)
|
|
{
|
|
edge[nedge].v = v ;
|
|
edge[nedge].w = w ;
|
|
edge[nedge].next = head[u] ;
|
|
head[u] = nedge++ ;
|
|
}
|
|
void spfa(int st)
|
|
{
|
|
queue<int> que ;
|
|
memset(vis , 0 ,sizeof(vis)) ;
|
|
for(int i = 0;i < n;i++)
|
|
dis[st][i] = i == a[st] ? 0 : inf ;
|
|
que.push(a[st]) ;
|
|
vis[a[st]] = 1;
|
|
while(que.size())
|
|
{
|
|
int u = que.front() ;
|
|
que.pop() ;
|
|
vis[u] = 0 ;
|
|
for(int i = head[u] ; i != -1 ;i = edge[i].next)
|
|
{
|
|
int v = edge[i].v ;
|
|
if(dis[st][v] > dis[st][u] + edge[i].w)
|
|
{
|
|
dis[st][v] = dis[st][u] + edge[i].w ;
|
|
if(!vis[v])
|
|
vis[v] = 1 , que.push(v) ;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
int ans = inf ;
|
|
void dfs(int pos , int sum , int step)
|
|
{
|
|
if(step == num)
|
|
{
|
|
ans = min(ans , sum + dis[pos][0]) ;
|
|
return ;
|
|
}
|
|
for(int i = 1;i <= num;i++)
|
|
if(vis[a[i]])continue ;
|
|
else
|
|
{
|
|
vis[a[i]] = 1;
|
|
dfs(i , sum + dis[pos][a[i]] , step + 1) ;
|
|
vis[a[i]] = 0 ;
|
|
}
|
|
}
|
|
int main()
|
|
{
|
|
int t ;
|
|
scanf("%d" ,&t) ;
|
|
while(t--)
|
|
{
|
|
scanf("%d%d" , &n , &m) ;
|
|
memset(head , -1 , sizeof(head)) ;
|
|
nedge = 0 ;
|
|
while(m--)
|
|
{
|
|
int u , v , w ;
|
|
scanf("%d%d%d" , &u , &v ,&w) ;
|
|
addedge(u , v , w) ;
|
|
addedge(v , u , w) ;
|
|
}
|
|
scanf("%d" , &num) ;
|
|
spfa(0) ;
|
|
for(int i = 1;i <= num ; i++)
|
|
scanf("%d" , &a[i]) , spfa(i) ;
|
|
ans = inf ;
|
|
memset(vis , 0 ,sizeof(vis)) ;
|
|
dfs(0 , 0 , 0) ;
|
|
cout<<ans<<endl;
|
|
}
|
|
}
|