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=sc.nextInt();
int r=sc.nextInt();
int d=sc.nextInt();
int a[]=new int [101];
for(int i=d;i<101;i+=d) {
	a[i]++;
}
int count=0;
for(int i=l;i<=r;i++) {
	if(a[i]>=1) {
		count++;
	}
}
System.out.println(count);
	}

}
