itertools.combinations() in Python HackerRank Solution

Hello Programmers, In this post, you will know how to solve the itertools.combinations() in Python HackerRank Solution. This problem is a part of the HackerRank Python Programming Series.

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One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.

itertools.combinations() in Python HackerRank Solution

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itertools.combinations(iterable, r)
This tool returns the r length subsequences of elements from the input iterable.
Combinations are emitted in lexicographic sorted order. So, if the input iterable is sorted, the combination tuples will be produced in sorted order.

Sample Code :

>>> from itertools import combinations
>>>
>>> print list(combinations('12345',2))
[('1', '2'), ('1', '3'), ('1', '4'), ('1', '5'), ('2', '3'), ('2', '4'), ('2', '5'), ('3', '4'), ('3', '5'), ('4', '5')]
>>>
>>> A = [1,1,3,3,3]
>>> print list(combinations(A,4))
[(1, 1, 3, 3), (1, 1, 3, 3), (1, 1, 3, 3), (1, 3, 3, 3), (1, 3, 3, 3)]

Task :

You are given a string S.
Your task is to print all possible combinations, up to size k, of the string in lexicographic sorted order.

Input Format :

A single line containing the string S and integer value k separated by a space.

Constraints :

• 0 < k <= len(S)

The string contains only UPPERCASE characters.

Output Format :

Print the different combinations of string S on separate lines.

Sample Input :

HACK 2

Sample Output :

A
C
H
K
AC
AH
AK
CH
CK
HK

itertools.combinations() in Python HackerRank Solutions

# itertools.combinations() in Python - Hacker Rank Solution
# Python 3
# Enter your code here. Read input from STDIN. Print output to STDOUT
# itertools.combinations() in Python - Hacker Rank Solution START
from itertools import combinations
io = input().split()
S = io[0]
k = int(io[1])
for i in range(1,k+1):
    for j in combinations(sorted(S),i):
        print("".join(j))

Disclaimer: The above Problem (itertools.combinations() in Python) is generated by Hackerrank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.

Next: itertools.combinations_with_replacement() in python HackerRank Solution