using System;
public class Program
{
    static void Main()
    {
		
		string s = Console.ReadLine();
		
        string[] t = s.Split(' ');
        long b = long.Parse(t[0]);
        long a = long.Parse(t[1]);
        
		if(b!=0 && b%a == 0 ){
			Console.WriteLine(b / a);
		}else{
			Console.WriteLine(b / a + 1);
		}        
		
    }
}