Program to find string after deleting k consecutive duplicate characters in python

Suppose we have a string s and another value k, we repeatedly delete the earliest k consecutive duplicate characters, and return the final string.

So, if the input is like s = "paaappmmmma" k = 3, then the output will be "ma", as when we delete three "a"s to get "pppmmmma". Then we delete three "p"s to get "mmmma". Then delete three of the four "m"s to get "ma".

To solve this, we will follow these steps:

• do the following steps infinitely, do
  • count := 0
  • chars := get the unique characters from s
  • for each character c in chars, do
    • if k consecutive c is in s, then
      • delete k consecutive c from s
      • count := count + 1
  • if count is same as 0, then
    • come out from the loop
• returns

Let us see the following implementation to get better understanding:

Example

Live Demo

class Solution:
   def solve(self, s, k):
      while True:
         count = 0
         chars = set(s)
         for c in chars:
            if c * k in s:
               s = s.replace(c * k, "")
               count += 1
         if count == 0:
            break
      return s

ob = Solution()
s = "paaappmmmma"
k = 3
print(ob.solve(s, k))

Input

"paaappmmmma", 3

Output

ma

Arnab Chakraborty

Published on 26-Nov-2020 07:01:17

• Related Questions & Answers
• Program to find string after removing consecutive duplicate characters in Python
• Find all possible substrings after deleting k characters in Python
• Program to find minimum amplitude after deleting K elements in Python
• Python program to find all duplicate characters in a string
• Program to find maximum difference of adjacent values after deleting k numbers in python
• Program to find minimum length of string after deleting similar ends in Python
• Java Program to find duplicate characters in a String?
• Program to find cost to remove consecutive duplicate characters with costs in C++?
• Program to check whether palindrome can be formed after deleting at most k characters or not in python
• Java program to find all duplicate characters in a string
• Program to find minimum amplitude after deleting KLength sublist in Python
• Python – Insert character in each duplicate string after every K elements
• Find All Duplicate Characters from a String using Python
• Program to remove duplicate characters from a given string in Python
• C# Program to remove duplicate characters from String