from collections import Counter
total_shoes = int(input())
shoe_sizes = [int(i) for i in input().split()]
shoe_sizes = Counter(shoe_sizes)
customer = int(input())
profit = 0
for i in range(0,customer):
    each_cus = [int(i) for i in input().split()]
    if shoe_sizes.get(each_cus[0]) is not None and shoe_sizes.get(each_cus[0]):
        shoe_sizes.update({each_cus[0] : -1})
        profit += each_cus[1]
        
print(profit)