How many multiples of d are there among the integers between L and R (inclusive)?

Constraints

* All values in input are integers.
* 1 \leq L \leq R \leq 100
* 1 \leq d \leq 100

Input

Input is given from Standard Input in the following format:


L R d


Output

Print the number of multiples of d among the integers between L and R (inclusive).

Examples

Input

5 10 2


Output

3


Input

6 20 7


Output

2


Input

1 100 1


Output

100
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		try(Scanner sc = new Scanner(System.in)){
			int L = sc.nextInt();
			int R = sc.nextInt();
			int d = sc.nextInt();
			
			int count = 0;
			for(int i=L;i<=R;i++) {
				if(i%d == 0) {
					count++;
				}
			}
			System.out.println(count);
		}	
	}
}