#include "bits/stdc++.h"
using namespace std;
#define int long long
#define FOR(i, a, b) for(int i=(a);i<(b);i++)
#define RFOR(i, a, b) for(int i=(b-1);i>=(a);i--)
#define REP(i, n) for(int i=0; i<(n); i++)
#define RREP(i, n) for(int i=(n-1); i>=0; i--)
#define REP1(i, n) for(int i=1; i<=(n); i++)
#define RREP1(i, n) for(int i=(n); i>=1; i--)
#define ALL(a) (a).begin(),(a).end()
#define UNIQUE_SORT(l) sort(ALL(l)); l.erase(unique(ALL(l)), l.end());
#define CONTAIN(a, b) find(ALL(a), (b)) != (a).end()
#define out(...) printf(__VA_ARGS__)

int dxy[] = {0, 1, 0, -1, 0};

void solve();
signed main()
{
#if DEBUG
    std::ifstream in("input.txt");
    std::cin.rdbuf(in.rdbuf());
#endif
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
    return 0;
}

/*================================*/
#if DEBUG
#define SIZE 10
#else
#define SIZE 123450
#endif

int N,M,K;

struct Edge {
    int a,b,c;
    bool used=false;
    
    bool operator < (const Edge &e) const {
        return c < e.c;
    }
};
vector<Edge> E;
int uf[SIZE];

int get(int n) {
    if (uf[n] == n) return n;
    return uf[n] = get(uf[n]);
}

void join(int a, int b) {
    int a_ = get(a);
    int b_ = get(b);
    uf[a_] = uf[b_] = min(a_, b_);
}

void solve() {
    cin>>N>>M>>K;
    REP(i,M) {
        auto e = Edge();
        cin>>e.a>>e.b>>e.c;
        e.a--;e.b--;
        E.push_back(e);
    }
    REP(i,N) uf[i]=i;
    int j;
    REP(i,K) {
        cin>>j;
        auto e = E[--j];
        if (get(e.a) != get(e.b)) {
            join(e.a, e.b);
        }
        E[j].used=true;
    }
    sort(ALL(E));
    REP(i,M) {
        auto e = E[i];
        if (E[i].used) continue;
        if (get(e.a) != get(e.b)) {
            join(e.a, e.b);
            E[i].used=true;
        }
    }
    int ans = 0;
    REP(i,M) if (!E[i].used) ans += E[i].c;
    cout << ans << endl;
}