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  1. Prepare
  2. Algorithms
  3. Strings
  4. Alternating Characters
  5. Discussions

Alternating Characters

  • geovanni_luna
     + 0 comments

    Here is a python O(n) time and O(1) space solution:

    def alternatingCharacters(s):
    ch = s[0]
    remove = 0
    
    for i in range(1, len(s)):
        if s[i] == ch:
            remove += 1
        
        if s[i] != ch:
            ch = s[i]
    
    return remove