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Introduction To Python
Python is a widely-used, interpreted, object-oriented, and high-level programming language with dynamic semantics, used for general-purpose programming. It was created by Guido van Rossum, and first released on February 20, 1991.
Python is a computer programming language often used to build websites and software, automate tasks, and conduct data analysis. It is also used to create various machine learning algorithm, and helps in Artificial Intelligence. Python is a general purpose language, meaning it can be used to create a variety of different programs and isn’t specialized for any specific problems. This versatility, along with its beginner-friendliness, has made it one of the most-used programming languages today. A survey conducted by industry analyst firm RedMonk found that it was the most popular programming language among developers in 2020.
Link for the Problem – itertools.permutations() in Python – HackerRank Solution
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 Solution
# 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
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