# Merge The Tools in Python | HackerRank Solution

Hello coders, today we will be solving Merge The Tools in Python Hacker Rank Solution.

## Problem

Consider the following:

A string, s, of length n where s = c0c1. . . . cn-1.

An integer, k, where k is a factor of n.

We can split s into n/k substrings where each subtring, ti, consists of a contiguous block of k characters in s. Then, use each ti to create string ui such that:

The characters in ui are a subsequence of the characters in ti.

Any repeat occurrence of a character is removed from the string such that each character in ui occurs exactly once. In other words, if the character at some index j in ti occurs at a previous index < j in ti, then do not include the character in string ui.

Given s and k, print n/k lines where each line i denotes string ui.

Example

k = 3

There are three substrings of length 3 to consider: ‘AAA’, ‘BCA’ and ‘DDE’. The first substring is all ‘A’ characters, so u1 = ‘A’. The second substring has all distinct characters, so u2 = ‘BCA’. The third substring has 2 different characters, so u3 = ‘DE’. Note that a subsequence maintains the original order of characters encountered. The order of characters in each subsequence shown is important.

### Function Description

Complete the merge_the_tools function in the editor below.

merge_the_tools has the following parameters:

• string s: the string to analyze
• int k: the size of substrings to analyze

### Prints

Print each subsequence on a new line. There will be n/k of them. No return value is expected.

## Input Format

The first line contains a single string, s.

The second line contains an integer, k, the length of each substring.

## Constraints

• 1 <= n <= 10^4, where n is the length of s
• 1 <= k <= n
• It is guaranteed that n is a multiple of k.

Sample Input

```STDIN       Function
-----       --------
3           k = 3```

Sample Output

```AB
CA

Explanation

Split s into n/k = 9/3 = 3 equal parts of length k = 3. Convert each ti to ui by removing any subsequent occurrences of non-distinct characters in ti:

1. t0 = “AAB” – u0 = “AB”
2. t1 = “CAA” – u1 = “CA”

Print each ui on a new line.

## Solution – Merge The Tools in Python – Hacker Rank Solution

```def merge_the_tools(string, k):
temp = []
len_temp = 0
for item in string:
len_temp += 1
if item not in temp:
temp.append(item)
if len_temp == k:
print (''.join(temp))
temp = []
len_temp = 0
if __name__ == '__main__':
string, k = input(), int(input())
merge_the_tools(string, k)```

Disclaimer: The above Problem (Merge The Tools) is generated by Hacker Rank but the Solution is generated by CodingBroz. This tutorial is only for Educational and Learning purpose.

### 2 thoughts on “Merge The Tools in Python | HackerRank Solution”

1. Whenever I tried to code all I get is O(n^2), you are awesome bro.

2. def merge_the_tools(string, k):