from collections import Counter

if __name__ == "__main__":
    X = map(int, input())
    sizes = list(map(int, input().split()))
    N = int(input())
    demand = [list(map(int, input().split())) for i in range(N)]
    
    income = 0
    sizes = Counter(sizes)
    for size,price in demand:
        if sizes[size] != 0:
            income += price
            sizes[size] -= 1
    print(income)