from collections import Counter
'''
# method 1 without Counter:
def total_money_earned(N,shoes_sizes):
    total = 0
    shoe_size_price = []
    for _ in range(N):
        shoe_size_price = list(map(int,input().split()))
        if shoe_size_price[0] in shoe_sizes:
            total += shoe_size_price[1]
            shoe_sizes.remove(shoe_size_price[0])
            shoe_size_price.clear()
    return total
'''
# method 2 with Counter:
def total_money_earned(N,shoes_sizes):
    total = 0
    shoes= Counter(shoes_sizes)
    shoe_size_price = []
    for _ in range(N):
        size, price = map(int, input().split())
        if shoes[size]: 
            total += price
            shoes[size] -= 1
    return total

if __name__ == "__main__":
    X = int(input())
    shoe_sizes = list(map(int, input().split()))
    N = int(input())
    print(total_money_earned(N,shoe_sizes))