from collections import Counter

x = int(input().strip())
shoes = list(map(int, input().split()))
shoe_counter = Counter(shoes)
N = int(input().strip())

revenue = 0

for i in range(N):
    size, price = map(int, input().split())
    if shoe_counter[size] > 0:
        revenue+=price
        shoe_counter[size] -= 1
    elif shoe_counter[size] == 0:
        del shoe_counter[size]
        revenue +=0

print(revenue)