using System;
using System.Collections.Generic;
namespace Yuki
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] ss = Console.ReadLine().Split();
            int n = int.Parse(ss[0]);
            int d = int.Parse(ss[1]);
            var li = new List<int>() { 0 };
            int a = 0;
            int s = 0;

            while (true)
            {
                a += (n - s) / d;
                if ((n - s) % d == 0)
                {
                    a -= 1;
                    s = (-1 * (n - s) % d);
                }
                else
                {
                    s = (-1 * (n - s) % d) + d;
                }

                if (li.Contains(s))
                {
                    break;
                }
                else
                {
                    a += 1;
                    li.Add(s);
                }
            }
            Console.WriteLine(a);
        }
    }
}