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

Alternating Characters

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1968 Discussions

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  • calancea_bianca1
     + 0 comments

    def alternatingCharacters(s):

        # Write your code here
deletions=0
for i in range(1,len(s)):
    if s[i-1]==s[i]:
        deletions+=1
return deletions

  • alban_tyrex
     + 0 comments

    Here are my c++ approaches of solving this, video explanation here : https://youtu.be/KoDlxS38_ig

    Solution 1 : Using loop

    int alternatingCharacters(string s) {
    int result = 0;
    for(int i = 1; i < s.size(); i++) if(s[i] == s[i-1]) result++;
    return result;
}

    Solution 2 : Using regex

    int alternatingCharacters(string s) {
    regex re("A{2,}|B{2,}");
    return s.size() - regex_replace(s, re, "*").size();
}

  • patrickgao2020
     + 0 comments

    Here is my one line Python solution!

    def alternatingCharacters(s):
    return len([True for i in range(1, len(s)) if s[i] == s[i - 1]])

  • debrupchatterje1
     + 1 comment

    PYTHON CODE

    def alternatingCharacters(s):
    # Write your code here
    d=0
    sl=list(s)
    for i in range(0, len(sl)-1):
        if sl[i]==sl[i+1]:
            d+=1
    return d

  • nikhilmanojv
     + 0 comments

    python MyAnswer

    def alternatingCharacters(s): i=0 j=1 count=0 while i