from collections import deque

n = int(input())
S = [int(input()) for i in range(n)]
inf = 10**20
dis = [[inf]*n for i in range(n)]
m = int(input())
for i in range(m):
    a,b,c = map(int,input().split())
    dis[a][b] = c
    dis[b][a] = c

for i in range(n):
    dis[i][i] = 0

for k in range(n):
    for i in range(n):
        for j in range(n):
            if dis[i][k] != inf and dis[k][j] != inf:
                dis[i][j] = min(dis[i][j],dis[i][k]+dis[k][j])

ans = inf
for i in range(1,n-1):
    for j in range(1,n-1):
        if i == j:
            continue
        ans = min(ans,S[i]+S[j]+dis[0][i]+dis[j][-1]+dis[i][j])
print(ans)