itertools.permutations() in Python HackerRank Solution

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

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.permutations() in Python HackerRank Solution

Problem

itertools.permutations(iterable[, r])
This tool returns successive r length permutations of elements in an iterable.
If r is not specified or is None, then r defaults to the length of the iterable, and all possible full length permutations are generated.
Permutations are printed in a lexicographic sorted order. So, if the input iterable is sorted, the permutation tuples will be produced in a sorted order.
Sample Code :

>>> from itertools import permutations
>>> print permutations(['1','2','3'])
<itertools.permutations object at 0x02A45210>
>>>
>>> print list(permutations(['1','2','3']))
[('1', '2', '3'), ('1', '3', '2'), ('2', '1', '3'), ('2', '3', '1'), ('3', '1', '2'), ('3', '2', '1')]
>>>
>>> print list(permutations(['1','2','3'],2))
[('1', '2'), ('1', '3'), ('2', '1'), ('2', '3'), ('3', '1'), ('3', '2')]
>>>
>>> print list(permutations('abc',3))
[('a', 'b', 'c'), ('a', 'c', 'b'), ('b', 'a', 'c'), ('b', 'c', 'a'), ('c', 'a', 'b'), ('c', 'b', 'a')]

Task :

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

Input Format :

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

Constraints :

• 0 < k <= len(S)

Output Format :

Print the permutations of the string S on separate lines.

Sample Input :

HACK 2

Sample Output :

AC
AH
AK
CA
CH
CK
HA
HC
HK
KA
KC
KH

itertools.permutations() in Python HackerRank Solutions

# itertools.permutations() in Python - Hacker Rank Solution
# Python 3
# itertools.permutations() in Python - Hacker Rank Solution START
from itertools import permutations
s,k = input().split()
words = list(permutations(s,int(k)))
words = sorted(words, reverse=False)
for word in words:
    print(*word,sep='')
# itertools.permutations() in Python - Hacker Rank Solution END

Disclaimer: The above Problem (itertools.permutations() 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() in Python HackerRank Solution