#嘘

INF = 10 ** 9

N, M, K = map(int,input().split())

#assert (1 <= N <= 200 and K <= 5 and 1 <= K <= M <= N * (N - 1) // 2)

dist = [[0 if i == j else INF for i in range(N)] for j in range(N)]

R = list(map(int,input().split()))
points = []
nes_cost = 0
check_set = set()
for i in range(M):
    A, B, C = map(int,input().split())
    #assert(1 <= C <= 10 ** 4 and 1 <= A <= N and 1 <= B <= N and A != B)
    #assert((A, B) not in check_set and (B, A) not in check_set)
    if i + 1 in R:
        nes_cost += C
        points.append((A - 1, B - 1))


    check_set.add((A, B))
    dist[A - 1][B - 1] = C
    dist[B - 1][A - 1] = C

for i in range(N):
    for k in range(N):
        for j in range(N):
            dist[i][j] = min(dist[i][j], dist[i][k] + dist[k][j])




import itertools
ans = INF
for v in itertools.permutations(points):
    for i in range(2 ** K):
        now = 0
        now_cost = nes_cost
        for j in range(K):
            x, y = v[j]
            if 1 & (i >> j):
                now_cost += dist[now][x]
                now = y
            else:
                now_cost += dist[now][y]
                now = x
        now_cost += dist[now][N - 1]
        
        ans = min(ans, now_cost)
print(ans)