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.util.* ;
public class Main {
    public static void main(String[] args) {
        Main obj = new Main() ;
        Scanner S = new Scanner( System.in ) ;
        int l = S.nextInt() ;
        int r = S.nextInt() ;
        int k = S.nextInt() ;
        int result = 0 ;
        for( int i=l;i<=r;i++ ) {
            if( i%k==0 ) result++ ;
        }
        System.out.println( result ) ;
    }
}