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 java.io.*;
import java.util.*;

class Main {
    public static void main (String [] args) throws IOException {
        BufferedReader f = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(System.out);
        //--------------------------START WRITING HERE-----------------------------

        StringTokenizer st = new StringTokenizer(f.readLine());

        int L = Integer.parseInt(st.nextToken());
        int R = Integer.parseInt(st.nextToken());
        int d = Integer.parseInt(st.nextToken());

        int counter = 0;
        for(int i = L; i <= R; i++)
        {
            if(i%d==0)counter++;
        }

        out.println(counter);

        out.close();
    }
}