#include <bits/stdc++.h>
using namespace std;
#define NN 100005
#define oo 1e18
#define fi first
#define se second
typedef pair<long long, long long> ii;
int n, m, k;
long long d1[NN], d2[NN];
vector<int> sr;
vector<ii> adj[NN];
int ditra(){
for (int i = 0; i <= n; i++) d1[i] = d2[i] = oo;
priority_queue<ii, vector<ii>, greater<ii>> q;
for (auto x : sr){
d2[x] = d1[x] = 0;
q.push({0, x});
}
while (!q.empty()){
int u = q.top().se;
int du = q.top().fi;
q.pop();
if (du != d2[u]) continue;
for (auto x : adj[u]){
int v = x.fi;
int dv = x.se;
if (du + dv < d1[v]){
d2[v] = d1[v];
d1[v] = du + dv;
q.push({d2[v], v});
}
else if (du + dv < d2[v]){
d2[v] = du + dv;
q.push({d2[v], v});
}
}
}
return (int) d2[0];
}
int travel_plan(int N, int M , int R[][2], int L[], int k, int p[]){
n = N;
m = M;
for (int i = 0; i < m; i++){
int a = R[i][0], b = R[i][1], c = L[i];
adj[a].push_back({b, c});
adj[b].push_back({a, c});
}
for (int i = 0; i < k; i++){
sr.push_back(p[i]);
}
return ditra();
}
