usageOf_collections.Counter()

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

s = int(input())
col = Counter(map(int,input().split())) #count the number of times an element is repeated
total = 0

for i in range(int(input())): #takes the third input
    val = input().split()     #takes successive inputs 
    if int(val[0]) in col.keys():  #check if a the key is present in col  
        if col[int(val[0])] > 0:   # if present  add it to total
            total += int(val[1])
            col[int(val[0])] -= 1  #and decrease 1 from the value
        else:
            del col[int(val[0])] #if the element has a value of 0 delete the key                   

print(total)