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

collections.Counter()

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  • melarisong
     + 31 comments
    import collections

numShoes = int(raw_input())
shoes = collections.Counter(map(int, raw_input().split()))
numCust = int(raw_input())

income = 0

for i in range(numCust):
    size, price = map(int, raw_input().split())
    if shoes[size]: 
        income += price
        shoes[size] -= 1

print income

  • chizhkovaMV
     + 3 comments

    without counters... coz i think there is no need to use it here

    n = input()
boots = map(int, raw_input().split())
orders = [map(int, raw_input().split()) for _ in range(input())]
result = 0
for i in orders:
    if i[0] in boots:
        result += i[1]
        boots.remove(i[0])
print result

  • js001
     + 6 comments
    from collections import Counter
n = int(input())
s = Counter(map(int,input().split()))
x = int(input())
total = []
for i in range(x):
    a,b = map(int,input().split())
    if s[a] > 0:
		total.append(b)
		s.subtract(Counter([a]))
    else:
        pass

print (sum(total))

  • marinskiy
     + 7 comments

    Here is Python 3 solution from my HackerrankPractice repository:

    import collections


number_of_shoes = int(input())
sizes_in_stock = collections.Counter(map(int, input().split()))

total_revenue = 0

for _ in range(int(input())):
    size, price = map(int, input().split())
    if sizes_in_stock[size]:
        total_revenue += price
        sizes_in_stock[size] -= 1

print(total_revenue)

    Feel free to ask if you have any questions :)

  • HMoroliya
     + 4 comments

    Samajh me aaye to "Copy That" XD

    from collections import Counter

if __name__ == '__main__':
    total_joote, joote_ki_variety, total_grahak = (input(), Counter(map(int, input().split())), int(input()))
    galle_me_kitne_pese=0
    
    # Noto ki Barish 
    for _ in range(total_grahak):
        joota_ek_number_bada_dikhao, noto_ki_to_barish_ho_rai_hai = map(int, input().split())
        if joote_ki_variety[joota_ek_number_bada_dikhao] :
            galle_me_kitne_pese+=noto_ki_to_barish_ho_rai_hai
            joote_ki_variety[joota_ek_number_bada_dikhao]-=1
            
    # Aaj Ki Kamai
    print(galle_me_kitne_pese)
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