from collections import Counter

num_shoes = int(input())
size_inventory = Counter(int(x) for x in input().split())
num_customers = int(input())

customer_orders = []
profit = 0

for i in range(num_customers):
    customer_orders.append(tuple(int(x) for x in input().split()))

for (size, price) in customer_orders:
    if size_inventory[size] > 0:
        size_inventory[size] -= 1
        profit += price

print(profit)