NightmareOnCodeStreet.cs

using System;

class NightmareOnCodeStreet
{
    static void Main()
    {
        string input = Console.ReadLine();
        input = input.TrimStart('-');
        long count = 0;
        long sum = 0;
        long resultCount = 0;
        char[] digits = new char[input.Length];
        foreach (var item in input)
        {
            if (count % 2 == 1)
            {
                digits[count] = item;
            }                        
            count++;
        }
        for (int i = 0; i < digits.Length; i++)
        {
            if (i % 2 == 1)
            {                
                sum += long.Parse(digits[i].ToString());
                resultCount++;
            }
        }
        Console.WriteLine("{0} {1}",resultCount, sum);
    }
}