from collections import Counter
input() # we don't need to store this input
l = list(map(int, input().split()))
# conter to dict Object
cnt = Counter(l)
# Initial price is zero
ans = 0 
for i in range(int(input())):
    size , price = [int(i) for i in input().split()]
    if cnt[size] > 0:
        ans += price
        cnt.subtract({size:1}) # subtract by 1
print(ans)