using System;   

public class Program

{

    public static void Main()

    {

        var age= double.Parse(Console.ReadLine());

        var price=double.Parse(Console.ReadLine());

        var toyp=int.Parse(Console.ReadLine());

        int toy=0;

        int money=0;

        int fmoney=0;

        int dmoney=0;

        for(var i=1; i<=age; i++)

        {if(i%2!=0)

        {toy++;}

         else

         {fmoney=dmoney;

             money=money+10;

         dmoney=money+fmoney;}}

        Console.WriteLine(((toy*toyp)+dmoney)-Math.Floor(age/2));

        if(toy*toyp+dmoney>=price)

        {Console.WriteLine("Yes! {0:F2}", ((toy*toyp)+dmoney-Math.Floor(age/2))-price);}

        else

        {Console.WriteLine("No! {0:F2}", price-(toy*toyp+dmoney-Math.Floor(age/2)));}}}