N = input()
S = [input() for _ in xrange(N)]
M = input()

dist = [[float("inf")] * N for _ in xrange(N)]
for i in xrange(M):
    A, B, C = map(int, raw_input().split())
    dist[A][B] = dist[B][A] = C

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

ans = float("inf")
for i in xrange(1, N - 1):
    for j in xrange(1, N - 1):
        if i == j:
            continue

        ans = min(ans, dist[0][i] + dist[i][j] + dist[j][N - 1] + S[i] + S[j])
        
print ans