from collections import Counter
X = int(input())

shoes = Counter(map(int,input().split()))
# "4 5 6 7 7"
# ["4","5","6","7","7"]
# [4,5,6,7,7]
# {4:1,5:1,6:1,7:2}

N = int(input())
earned = 0

for i in range(N):
    size,price= map(int,input().split())
    if shoes[size] > 0:
        shoes[size]-=1
        earned += price

print(earned)