from collections import Counter

x = int(input())
size = list(map(int, input().split()))
size_count = Counter(size)
cus = int(input())
total = 0
for _ in range(cus):
    s, cost = map(int,input().split())
    if size_count[s] > 0:       # if stock available
        size_count[s] -= 1   
        total += cost
print(total)