from collections import Counter

number_of_shoes: int = int(input())
shoes_sizes_availability: Counter[int] = Counter(map(int, input().split()))

number_of_customers: int = int(input())

earnings: int = 0

for _ in range(number_of_customers):
    size, price = map(int, input().split())
    if shoes_sizes_availability[size] > 0:
        earnings += price
        shoes_sizes_availability[size] -= 1

print(earnings)