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

collections.Counter()

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  • cinnasinha
     + 0 comments
    from collections import Counter

X = int(input(""))
X_list = list(map(int, input("").split()))
N = int(input(""))

shoe_size = Counter(X_list)
sum = 0
for i in range(N):
    size, amount = tuple(map(int, input("").split()))
    if size in shoe_size.keys() and shoe_size[size] != 0:
        shoe_size[size] -= 1
        sum += amount
        
print(sum)

  • nishapg
     + 0 comments
    from collections import Counter
X = int(input())
size = list(map(int, input().split(' ')))
csize = Counter(size)
N = int(input())
sum = 0
for i in range(N):
    s,price = list(map(int, input().split(' ')))
    if s in csize.keys():
        if csize[s]>0:
            sum += price
            csize[s] -= 1

    print(sum)

  • gilbertcambell8
     + 0 comments

    You can think of it like playing touchcricket with the available shoes, if the right size is "in play," the customer can score a purchase, and you earn money!

  • rupareliyapiyush
     + 0 comments

    from collections import Counter

    X = int(input()) Xlst = list(map(int, input().split())) cnt = Counter(Xlst)

    N = int(input()) suma=0

    for i in range(N): a,b = list(map(int, input().split()))

    if(a in cnt.keys()):
    if cnt[a]>0:
        suma+=b
        cnt[a] = cnt[a]-1

    print(suma)

  • HilaryHollis4
     + 0 comments

    This is a great way to explain a Counter in Python! It’s essentially a specialized dictionary from the collections module that makes counting hashable objects easy and efficient. Instead of manually, cricbet99.com login password