Solution.java

//Problem: https://www.hackerrank.com/challenges/beautiful-days-at-the-movies
//Java 8
import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution. */
        Scanner input = new Scanner(System.in);
        int i = input.nextInt();
        int j = input.nextInt();
        int k = input.nextInt();
        
        int beautifulDays = 0;
        
        for(int x = i; x <= j; x++)
        {
            StringBuilder day = new StringBuilder(String.valueOf(x));
            int xReverse = Integer.parseInt(day.reverse().toString());
                
            if(Math.abs(x-xReverse) % k == 0)
            {
                beautifulDays++;
            }
        }
        System.out.println(beautifulDays);
    }
}