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

collections.Counter()

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1409 Discussions

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  • kapoorva1309
     + 0 comments

    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)

  • pranaynikhare7
     + 0 comments
    x = int(input())
shoe_sizes = list(map(int, input().split()))
n = int(input())
l1 = []
for i in range(n):
    l1.append(list(map(int,input().split())))

from collections import Counter
avail_shoe = Counter(shoe_sizes)
cost = 0
for i in l1:
    if avail_shoe[i[0]] > 0:
        cost += i[1]
        avail_shoe[i[0]] = avail_shoe[i[0]] - 1
        
print(cost)

  • 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))