from collections import Counter

X = int(input())
sizes = Counter(list(map(int, input().split(' '))))
N = int(input())
earning = 0

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

print(earning)