using static System.Math;
using System.Collections.Generic;
using System.Linq;
using System;

public class Hello
{
    static void Main()
    {
        var a = long.Parse(Console.ReadLine().Trim());
        var b = long.Parse(Console.ReadLine().Trim());
        if (a == 1) Console.WriteLine(10);
        else Console.WriteLine(b / (1 - a));
    }
}