from collections import defaultdict
from heapq import heappop, heappush

n = int(input())
P = [int(input()) for _ in range(n)]
m = int(input())
Edge = defaultdict(list)
for _ in range(m):
    a, b, c = map(int, input().split())
    Edge[a].append((b, c))
    Edge[b].append((a, c))

INF = 10**18
C = [[INF for _ in range(n)] for _ in range(n)]
for i in range(n):
    C[i][i] = 0
    Heap = [(0, i, -1)]
    while Heap:
        cost, curr, prev = heappop(Heap)
        if cost > C[i][curr]:
            continue
        for np, d in Edge[curr]:
            if np == prev:
                continue
            if cost + d > C[i][np]:
                continue
            C[i][np] = cost + d
            heappush(Heap, (cost + d, np, curr))

ans = INF
for i in range(1, n - 1):
    for j in range(1, n - 1):
        if i == j:
            continue
        ans = min(ans, C[0][i] + P[i] + C[i][j] + P[j] + C[j][n - 1])
print(ans)