beautifuldayatthemovies

import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.regex.*;

public class Solution {

    //write function to reverse integer by converting integer
    static int reverse(int a){
        String b = String.valueOf(a);
        String c = "";
        for(int i = b.length() - 1; i > -1; i--){
            c = c + b.charAt(i);
        }
        int d = Integer.valueOf(c);
        return d;
    } 
    // Complete the beautifulDays function below.
    static int beautifulDays(int i, int j, int k) {
        //set count of number of beautiful days
        //loop through each integer between i and j and determine if the absolute value of the integer - reverse(integer) is divisible by k; if it is, increment count
    
        int count = 0;
        for(int l = i; l <= j; l++){
            int m = Math.abs(l - reverse(l));
            if(m % k == 0){
                count++;
            }
        }
        //print count
        return(count);
    }

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        String[] ijk = scanner.nextLine().split(" ");

        int i = Integer.parseInt(ijk[0]);

        int j = Integer.parseInt(ijk[1]);

        int k = Integer.parseInt(ijk[2]);

        int result = beautifulDays(i, j, k);

        bufferedWriter.write(String.valueOf(result));
        bufferedWriter.newLine();

        bufferedWriter.close();

        scanner.close();
    }
}