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

collections.Counter()

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  • patilprathames25
     + 0 comments

    from collections import Counter

    number_of_shoes = int(input()) sizes_of_shoes = list(map(int,input().split())) number_of_customer = int(input())

    sizes = Counter(sizes_of_shoes)

    money = 0

    for _ in range(number_of_customer): size , price = map(int,input().split())

    if size in sizes and sizes[size] > 0:
    money = money + price
    sizes[size] = sizes[size] -1

    print(money)

  • tiwarirahul479
     + 0 comments

    Here is the most optimised and cleaner code (without constraint) for this problem:-

    from collections import Counter
no_of_shoes = int(input())
size_list = map(int, input().split(" "))
total_customers = int(input())

size_dict = Counter(size_list)

earning = 0
for j in range(total_customers):
    i = list(map(int, input().split(" ")))
    if size_dict[i[0]]:
        earning += i[1]
        size_dict[i[0]] -= 1

print(earning)

    `

  • shankar_b_p
     + 0 comments
    from collections import Counter
total_shoes = int(input())
shoe_sizes = [int(i) for i in input().split()]
shoe_sizes = Counter(shoe_sizes)
customer = int(input())
profit = 0
for i in range(0,customer):
    each_cus = [int(i) for i in input().split()]
    if shoe_sizes.get(each_cus[0]) is not None and shoe_sizes.get(each_cus[0]):
        shoe_sizes.update({each_cus[0] : -1})
        profit += each_cus[1]
        
print(profit)

  • kapoorva1309
     + 1 comment

    Why all test cases are not getting passed, can anyone shed some light on my mistake.

    from collections import Counter

x = int(input())
s = list(map(int,input().split()))
n = int(input())
c = set()

for i in range(0, n):
    j = list(map(int,input().split()))
    c.add(tuple(j))

c = list(c)
for i in range(0,len(c)):
    c[i] = list(c[i])
    
d = dict(Counter(s))

su = 0

for i in range(0,len(c)):
    if c[i][0] in d.keys() and d[c[i][0]]>0:
        d[c[i][0]] -= 1
        su = su + c[i][1]     

print(su)

  • neha_singh19aug
     + 0 comments
    from collections import Counter
if __name__=='__main__':
    X,shoe_sizes,N=int(input()),Counter(list(map(int, input().split()))),int(input())
    earnings=0
    for _ in range(N):
        size,price= map(int, input().split())
        if size in shoe_sizes.keys() and shoe_sizes[size]>0:
            earnings+=price
            shoe_sizes[size]-=1
        
    print(earnings)