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 Scala (2.13.1) (judge verdict: Accepted)

object Main extends App {
  val inputs: Seq[String] = scala.io.Source.stdin.getLines().toList
  val lrd    = inputs(0).split(" ").map(_.toInt)
  val l = lrd(0)
  val r = lrd(1)
  val d = lrd(2)

  println(solve(l, r, d))

  def solve(l: Int, r: Int, d: Int): Int = {
    var ans = 0
    (l to r).foreach { i =>
      if (i % d == 0) {
        ans = ans  + 1
      }
    }
    ans
  }
}