using System;

public class Program

{

    public static void Main()

    {

        double[] arr = {12,-23432, .32,10, 500, 500,-56};

        double? a,b,c = Double.MinValue;

        a = b = c;

        int arrLength = arr.Length;

​

        for (int i = 0;i<arr.Length;i++){

            if(a<=arr[i]){

                c = b;

                b = a;

                a = arr[i];

            }

            else if(b<=arr[i]){

                c = b;

                b = arr[i];

            }

            else if(c<=arr[i]){

                c = arr[i];

            }

        }

        Console.WriteLine((arr.Length<3)?"There are only "+arrLength+" numbers.":"The third lowest number is " + c.ToString()+".");

    }

}