using System;
using System.Globalization;

class Program
{
    public static void Main(string[] args)
    {
        var w = int.Parse(Console.ReadLine());
        var d = int.Parse(Console.ReadLine());
        for (int i = d; i > 0; i--)
        {
            if (i == 1)
            {
                Console.WriteLine(w.ToString(CultureInfo.InvariantCulture));
                return;
            }
            var work = (int) ((double) w/i/i);
            w -= work;
        }
    }    
}