n = int(input())
red_price = list(map(int,input().split()))
minsum_price = 0
for i in range(n):
    b ,c = map(int,input().split())
    red_to_blue_price = red_price[b-1] + red_price[c-1]
    minsum_price += min(red_to_blue_price,red_price[i])
print(minsum_price)