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 C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

namespace Multiples
{
    class Program
    {
        static void Main(string[] args)
        {
            int L, R, d ,cnt_i;

            string inD0 = Console.ReadLine();
            string[] cngD0 = inD0.Split(' ');

            
            L = int.Parse(cngD0[0]);
            R = int.Parse(cngD0[1]);
            d = int.Parse(cngD0[2]);

            cnt_i = 0;
            for (int i = L; i <= R; i++)
            {
                if((i % d) == 0)
                {
                    cnt_i++;
                }
            }


            Console.WriteLine(cnt_i);
        }
    }
}