number_shoes = int(input())
shoe_size = list(map(int,input().split(" ")))
number_customers = int(input())
total_sold_value = 0

for _ in range(number_customers):
    customer_purchase = list(map(int,input().split(" ")))
    if customer_purchase[0] in shoe_size:
        total_sold_value += customer_purchase[1]
        shoe_size.remove(customer_purchase[0])

print(total_sold_value)