# Enter your code here. Read input from STDIN. Print output to STDOUT

def calculate_total_revenu(shoes_available=None, customers=None):
    '''
        input's
            shoes_available - A dictionary item where key=shoe_size value=number_pairs_available
            customers - A list of customers and their desired shoe size and sale price.

        returns
            total_revenue as an integer value.
    '''
    #initialize the total_revenu tag
    total_revenue = 0
    
    if shoes_available is None:
        shoes_available = []
    
    if customers is None:
        customers = {}
    
    for customer in customers:
        # Assign the customer's desired shoe size
        shoe_size = customer[0]
        # Assign the customer's sale price for said shoe.     
        shoe_price = customer[1]
        
        if shoes_available[shoe_size] > 0:
            # Add the shoe price to the total revenue if said size is still available
            total_revenue += shoe_price
            # Remove one shoe from the available sizes if we sold the pair of shoes.
            shoes_available[shoe_size] -= 1

    return total_revenue

def read_info_from_STDIN():
    '''
        returns
            tuple (number_of_shoes_avalable, customers)
            number_of_shoes_available --> dict with key=shoe_size value=number_pairs_available
            customers --> list of customers desired shoe size and sale price.
    '''
    from collections import Counter
    
    # Read in the number of shoes from STDIN and convert to integer
    number_of_shoes = int(input())
    # Read the list of shoe sizes from STDIN and convert each size to an integer
    # Create a count of each size available and store it in a dictionary.
    shoes_available = Counter([int(i) for i in input().strip().split()])
    # Read in the list of customer shoe size and price from STDIN and convert to integer.
    # The number of customers is given in advance so the code can grab the correct number of customers.
    customers = [[int(i) for i in input().split()] for _ in range(int(input()))]
    
    return shoes_available, customers
    
if __name__ == '__main__':
    shoes_available, customers = read_info_from_STDIN()
    print(calculate_total_revenu(shoes_available, customers))