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  1. Prepare
  2. Python
  3. Collections
  4. collections.Counter()
  5. Discussions

collections.Counter()

  • hippophantez
     + 0 comments
    from collections import Counter

X = int(input()) # num of shoes
shoe_stock = Counter(list(map(int,input().split(" "))))
num_of_customers = int(input())
earned = 0
for i in range(num_of_customers):
    cust_size, cust_price = list(map(int,input().split(" ")))
    #if size is buyable then -1 to size and plus price
    if shoe_stock[cust_size]:
        shoe_stock[cust_size] -= 1
        earned += cust_price
print(earned)