from collections import Counter
X = int(input())
size = list(map(int, input().split(' ')))
csize = Counter(size)
N = int(input())
sum = 0
for i in range(N):
    s,price = list(map(int, input().split(' ')))
    if s in csize.keys():
        if csize[s]>0:
            sum += price
            csize[s] -= 1