03. Elevator

import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int persons = Integer.parseInt(scanner.nextLine()),
            capacity = Integer.parseInt(scanner.nextLine()),
            courses = (int)(Math.ceil((double)(persons) / (double)(capacity)));

        System.out.println(courses);
    }
}