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

collections.Counter()

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1406 Discussions

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  • nandakumars825
     + 0 comments

    Way 1

    from collections import Counter

X = int(input())
shoe_sizes = Counter(map(int,input().split()))
N = int(input())
total_price = 0
for i in range(N):
    size, price = list(map(int,input().split()))
    if shoe_sizes[size] !=0:
        total_price+= price
        shoe_sizes[size] -= 1
        
print(total_price)

    Way 2

       X = int(input())
shoe_sizes = list(map(int,input().split()))

unique = set(shoe_sizes)
count_dict = {size: 0 for size in unique}

for shoe_size in shoe_sizes:
    count_dict[shoe_size] +=1

N = int(input())
total_price = 0
for i in range(N):
    size, price = list(map(int,input().split()))
    if size in count_dict.keys():
        if count_dict[size] !=0:
            total_price+= price
            count_dict[size] -= 1
        
print(total_price)

  • jostte84
     + 0 comments

    from collections import Counter

    X = int(input()) sizes = list(map(int, input().split())) customers = int(input()) orders = list()

    for i in range(customers): x, y = map(int, input().split()) orders.append({x: y})

    sizes_count = Counter(sizes)

    list_prices = list()

    for order in orders: k, v = list(order.items())[0] if (k in sizes_count.keys()) & (sizes_count[k] > 0): sizes_count[k] -= 1 list_prices.append(v)

    print(sum(list_prices))

  • sailajsreeram
     + 0 comments

    here in constraints 2

  • pithambar20
     + 0 comments
    from collections import Counter

x = input()

shoeList = list(input().split())

shoeListOrg = Counter(shoeList)

N = int(input())

price = list()

for i in range(N):
    sizeAndPrice = list(input().split())
    
    for key in shoeListOrg:
        
        if key == sizeAndPrice[0]:
            if shoeListOrg[key] != 0:
                price.append(int(sizeAndPrice[1]))
                shoeListOrg[key] = shoeListOrg[key] - 1
        else:
            pass

print(sum(price))

  • gurnoor8412
     + 0 comments

    Here's my solution to this problem:-

    from collections import Counter shoes=int(input()) shoe_size=list(map(int,input().split())) counter=Counter(shoe_size) customers=int(input()) lst=[] for i in range(1,customers+1): customer_info,price=map(int,input().split()) if counter[customer_info]>0: counter[customer_info]-=1 lst.append(price) else: pass print(sum(lst))