from collections import Counter

x = input()

shoeList = list(input().split())

shoeListOrg = Counter(shoeList)

N = int(input())

price = list()

for i in range(N):
    sizeAndPrice = list(input().split())
    
    for key in shoeListOrg:
        
        if key == sizeAndPrice[0]:
            if shoeListOrg[key] != 0:
                price.append(int(sizeAndPrice[1]))
                shoeListOrg[key] = shoeListOrg[key] - 1
        else:
            pass

print(sum(price))