We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Algorithms
  3. Strings
  4. Palindrome Index
  5. Discussions

Palindrome Index

  • Ahmed_El_dreny
     + 1 comment

    C solution

    int string_length (char* str)
{
    int len;
    for(len = 0; str[len]; len++);
    return len;
}

int palindromeIndex(char* s)
{
    int len = string_length(s);
    for (int counter = 0; counter < len/2; counter++)
    {
        if (s[counter] != s[len - 1 - counter])
        {
            if (s[counter] == s[len - 2 - counter])
            {
                if (s[counter + 1] == s[len - 3 - counter])
                {
                    return len - 1 - counter;
                }
            }
            return counter;
        }
    }
    return -1;
}