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 JavaScript (Node.js 12.16.1) (judge verdict: Accepted)

function Main(input) {
  let lines = input.split("\n");
  lines.pop();
  lines = lines[0].split(" ");
  fnum = parseInt(lines[0]);
  lnum = parseInt(lines[1]);
  multiple = parseInt(lines[2]);
  let count = 0;
  for(let i = fnum; i <= lnum; i++){
  	if(i%multiple === 0) count++;
  }
  console.log(count);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));