x = int(input())
shoe_sizes = list(map(int, input().split()))
n = int(input())
l1 = []
for i in range(n):
    l1.append(list(map(int,input().split())))

from collections import Counter
avail_shoe = Counter(shoe_sizes)
cost = 0
for i in l1:
    if avail_shoe[i[0]] > 0:
        cost += i[1]
        avail_shoe[i[0]] = avail_shoe[i[0]] - 1
        
print(cost)