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)

'use strict'

function main(input) {
    let l = Number(input.split('\n')[0].split(' ')[0]);
    let r = Number(input.split('\n')[0].split(' ')[1]);
    let d = Number(input.split('\n')[0].split(' ')[2]);

    let ans = 0;
    for (let i = l; i <= r; i++) {
        if (i%d===0) {
            ans++;
        }
    }
    console.log(ans);
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));