from collections import Counter
int(input()) # X, the number of shoes, is unused
shoe_sizes = Counter(map(int, input().split()))
money = 0
for _ in range(int(input())):
    buyer = list(map(int, input().split()))
    buyer_size = buyer[0]
    if buyer_size in shoe_sizes:
        shoe_sizes -= Counter([buyer_size])
        money += buyer[1]
print(money)