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: Wrong Answer)

function main(input){
	input=input.split(" ");
var L=input[0];
var R=input[1];
var d=input[2];
var ss=Math.floor(R/d);
var dd=Math.floor(L/d);
if(R&d==L&d){
console.log(ss-dd+1);
}else{
console.log(ss-dd);
}
}

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