using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter target rating");

        var targetRating = Int32.Parse(Console.ReadLine());

        Console.WriteLine("Enter current rating");

        var currentRating = Double.Parse(Console.ReadLine());

        var date = DateTime.Now;

        var weeks=0;

        while(currentRating <= targetRating){

            if(currentRating > 0){

                currentRating = currentRating - 0.3*currentRating;

            }

            date = date.AddDays(7);

            currentRating = currentRating + 2100;

            weeks++;

        }

        Console.WriteLine(date.ToString("dd-MM-yyyy"));

            Console.WriteLine("weeks "+weeks);

    }

}