Problem:
Score : 100 points

Problem Statement

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).

Sample Input 1

5 10 2

Sample Output 1

3

Among the integers between 5 and 10, there are three multiples of 2: 6, 8, and 10.

Sample Input 2

6 20 7

Sample Output 2

2

Among the integers between 6 and 20, there are two multiples of 7: 7 and 14.

Sample Input 3

1 100 1

Sample Output 3

100

Solution in Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import javax.sound.midi.Soundbank;
import java.util.*;
import java.lang.*;

public class Main
{
    public static void main (String[] args)
    {
        // your code goes here
        Scanner s = new Scanner(System.in);
        int l = s.nextInt();
        int r = s.nextInt();
        int d = s.nextInt();
        int c = 0;
        if(l%d==0)
            c++;
        if(r%d==0)
            c++;
        if(c==2)
            c--;
        c+=(r-l)/d;

        System.out.println(c);

    }
}