AOC1A

fun main(args: Array<String>)
{
    // Fetch Input
    val input = input()

    // Iterate Chars
    var total = 0
    var n = 0
    while(++ n < input.length)
    {
        if(input[n - 1] == input[n]) total += Integer.parseInt(input[n].toString())
    }

    // Render Result
    println(total)
    // NOTE: okay so my last and first char were the same, I manually added these :/
}