itertools-combination| HackerRank

 This simple problem tricks is to we have to  use loop iterations to  print each single combinations  with single char and with  pair both  so  we first create list sorted string so our task get  little ease and then using for loop  incremental  we generate combinations for each and then using another inner loop we print and join there set and there items  using join

Problem:https://www.hackerrank.com/challenges/itertools-combinations/problem?isFullScreen=true

Code:

# Enter your code here. Read input from STDIN. Print output to STDOUT

#Naive

S, k = input().split()

S = sorted(S) #["A", "C", "H","K"]

from itertools import combinations

for i in range(1,int(k)+1):

    combo = combinations(S,i)

    for c in combo:#Printing Each

        print("".join(c))

The code generates all possible combinations of characters

from a given string S, with the length of each combination

ranging from 1 up to a specified number k.

It first sorts the string S alphabetically to ensure

that the combinations are printed in lexicographical order.

By using the combinations function from Python’s itertools module,

the code systematically creates combinations of various lengths,

from 1-character combinations to k-character combinations.

Each combination is then printed as a concatenated string.

The process utilizes a nested loop: the outer loop controls the combination

lengths, and the inner loop iterates over each combination,

printing the results one by one. This approach is efficient for

generating and displaying all possible combinations of characters

from the sorted string.