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 {

  private static void solve(int L, int R, int d) {
    int res = 0;
    for (int i = L; i <= R; i++) {
      if (i % d == 0) {
        res++;
      }
    }
    System.out.println(res);
  }

  public static void main(String[] args) {
    int L = scanner.nextInt();
    int R = scanner.nextInt();
    int d = scanner.nextInt();
    solve(L, R, d);
  }

  private static final Scanner scanner = new Scanner(System.in);
}