using System;
using System.Collections.Generic;
using System.Linq;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            long w = long.Parse(Console.ReadLine());
            long d = long.Parse(Console.ReadLine());
            for (; d > 1; d--)
            {
                w -= w / (d * d);
            }
            Console.WriteLine(w);
        }
    }
}