using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Stairs
{
	class Program
	{
		static void Main(string[] args)
		{
			Program program = new Program();

			decimal TempleStairs = Convert.ToDecimal(program.GetInputData());
			decimal HouseStairs = Convert.ToDecimal(program.GetInputData());

			if(TempleStairs < HouseStairs)
			{
				Console.WriteLine("1");
				return;
			}

			if(TempleStairs%HouseStairs == 0)
			{
				Console.WriteLine((TempleStairs / HouseStairs) + 1);
			}
			else
			{
				Console.WriteLine(Math.Truncate(TempleStairs / HouseStairs) + 1);
			}		
		}

		public String GetInputData()
		{
			var Data = char.ConvertFromUtf32(Console.Read());

			if (Data == " " || Data == "\n" || Data == "\r")
				return "";
			else
				Data += GetInputData();

			return Data;
		}
	}
}