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Given a string S, remove consecutive duplicates from it recursively.

Question

Given a string S, remove consecutive duplicates from it recursively.

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Solution

Here is a step-by-step solution to remove consecutive duplicates from a string recursively:

  1. First, we need to check if the string is empty or contains only one character. If it is, we return the string as it is because it doesn't have any consecutive duplicates.

  2. If the string has more than one character, we compare the first character with the second one. If they are the same, we call the function recursively, passing the substring starting from the second character.

  3. If the first character and the second character are not the same, we keep the first character and call the function recursively for the substring starting from the second character.

  4. We continue this process until we have processed the entire string.

Here is a Python code snippet that implements the above steps:

def removeDuplicates(S):
    if len(S) < 2:
        return S
    if S[0] == S[1]:
        return removeDuplicates(S[1:])
    else:
        return S[0] + removeDuplicates(S[1:])

In this code, S[0] represents the first character of the string, S[1:] represents the substring starting from the second character, and + is used to concatenate two strings. The function calls itself recursively until it has processed the entire string.

This problem has been solved

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