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.*;

public class Main{
	public static void main(String[] args){
      	Scanner sc = new Scanner(System.in);
    	int l = Integer.parseInt(sc.next());
      	int r = Integer.parseInt(sc.next());
      	int x = Integer.parseInt(sc.next());
      	int count = 0;
      	for(int cnt = l;cnt < r + 1;cnt++){
			if(cnt % x == 0){
            	count++;
      		}
        }
      	System.out.println(count);
    }
}
