/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

package gcj2012.qr;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;

/**
 *
 * @author Scott DellaTorre
 */
public class C {

    public static void main(String[] args) throws IOException {

        BufferedReader in = new BufferedReader(new FileReader("src/gcj2012/qr/in"));
        PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("src/gcj2012/qr/C.out")));

        int T = Integer.parseInt(in.readLine());
        for (int i = 0; i < T; i++) {
            StringTokenizer st = new StringTokenizer(in.readLine());
            int A = Integer.parseInt(st.nextToken()); // Number of Googlers
            int B = Integer.parseInt(st.nextToken()); // Number of suprising cases

            int pairs = 0;

            for (int j = A; j <= B; j++) {
                pairs += countRecycled(j, B);
            }

            out.println("Case #" + (i + 1) + ": " + pairs);
        }

        out.close();
    }

    private static int countRecycled(int number, int max) {
        List<Integer> list = new ArrayList<>();
        int log10 = (int) Math.log10(number);
        for (int i = 1; i <= log10; i++) {
            int recycled = recycle(number, i, max);
            if (recycled != -1 && !list.contains(recycled)) {
                list.add(recycled);
            }
        }
        return list.size();
    }

    private static int recycle(int number, int count, int max) {
        int oldNumber = number;

        int divisor = (int) Math.pow(10, count);
        int end = number % divisor;
        number /= divisor;
        int multiplicand = (int) Math.pow(10, (int) Math.log10(number) + 1);
        number += end * multiplicand;

        if (number <= oldNumber || number > max) {
            return -1;
        }
        return number;
    }
}
