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Iterables and Iterators

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  • vyoma_patel
     + 0 comments
    from itertools import combinations
N = int(input())
letters = input().split()
K = int(input())

#Creating list of letters with r=K
combos = list(combinations(letters, K)) 

#Incrementing value of count by 1 if 'a' found in c
count = sum(1 for c in combos if 'a' in c) 

#Calculating count by total no. of c(tuples) in combos and rounding up to 3 decimal places
print(f"{count/len(combos):.3f}")

  • rohitambasta_ii1
     + 0 comments
    from itertools import combinations

n= int(input())
letters= input().split()
k= int(input())

possibilities = combinations(letters, k)
all_= list(possibilities)
a_Exists= []

for i in all_:
    if "a" in i:
        a_Exists.append(i)

print(len(a_Exists)/ len(all_))

  • EstherDoll1
     + 0 comments

    Great for anyone looking to write cleaner, more Pythonic code. Thanks to the community for sharing tips and examples—it makes learning so much smoother! Fairplay24 pro sign up

  • yashdeora98294
     + 0 comments

    Here is HackerRank Iterables and Iterators in python solution - https://programmingoneonone.com/hackerrank-iterables-and-iterators-solution-in-python.html

  • qhuac
     + 0 comments

    import math

    N = int(input()) all_strs = input().split() K = int(input())

    non_a_num = len(list(filter(lambda x: x!= "a", all_strs))) if non_a_num < K: print(1) else: print(1 - (math.factorial(non_a_num)/math.factorial(non_a_num-K))/(math.factorial(N)/math.factorial(N-K)))