num_shoes = input()

size_list = input().split()

customers_count = int(input())

sale_dict = dict()

total = 0

for item in range(customers_count):
    sale_dict.update({f'{item}' : (input().split())})

for x,y in sale_dict.items():
    if y[0] in size_list:
        total += int(y[1])
        size_list.remove(y[0])

print(total)