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: Wrong Answer)

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();
    double defValue = Math.ceil( ((double)L) / ((double)d));
    
    
    int i = (int)defValue;
    while(i * d <= R)
    {
 		i++;
    }
    
        System.out.println(i -  defValue);
      
  }
}