using System;

public class Program

{

    public static void Main()

    {

        var StairsClimberCalculator = new StairsClimberCalculator();

        int numberOfWays = StairsClimberCalculator.CalculateNumberOfWays(1);

        Console.WriteLine("Number of different ways to claim stairs: " + numberOfWays);

    }

}

​

public class StairsClimberCalculator

{

    public int CalculateNumberOfWays(int stairs)

    {

        return 0;

    }   

}