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

Alternating Characters

  • 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();
}