using System;

public class Hello
{
    public static void Main()
    {
        var w = long.Parse(Console.ReadLine().Trim());
        var d = long.Parse(Console.ReadLine().Trim());
        var a = 0L;
        var imax = (long)Math.Min(d, Math.Sqrt(w) + 1);
        for (long i = imax; i >= 1; i--)
        {
            a = w / (i * i);
            w -= a;
        }
        Console.WriteLine(a);
    }
}