/*
 * 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 round1;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.HashSet;
import java.util.Scanner;

public class Recycled {

	private int noCases;
	private int[] minBounds;
	private int[] maxBounds;
	private int[] noDigits;

	private void readFile(String filepath) {
		try {
			Scanner sc = new Scanner(new FileInputStream(new File(filepath)));
			noCases = Integer.parseInt(sc.nextLine());
			noDigits = new int[noCases];
			minBounds = new int[noCases];
			maxBounds = new int[noCases];

			for (int i = 0; i < noCases; i++) {
				String[] line = sc.nextLine().split(" ");
				noDigits[i] = line[0].length();
				minBounds[i] = Integer.parseInt(line[0]);
				maxBounds[i] = Integer.parseInt(line[1]);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
	}

	private int answer(int min, int max, int digits) {
		HashSet<Recycled.Pair> pairs = new HashSet<Recycled.Pair>();
		for (int n = min; n < max; n++) {
			for (int d = 1; d < digits; d++) {
				int m = n / (int) Math.pow(10, d) + n % (int) Math.pow(10, d)
						* (int) Math.pow(10, digits - d);

				if (m > n && m <= max) {
					pairs.add(new Pair(n,m));
				}
			}
		}
		return pairs.size();
	}

	public static void main(String args[]) {

		Recycled r = new Recycled();
		r.readFile(args[0]);

		for (int i = 1; i <= r.noCases; i++) {
			System.out.println("Case #"
					+ i
					+ ": "
					+ r.answer(r.minBounds[i - 1], r.maxBounds[i - 1],
							r.noDigits[i - 1]));
		}
	}

	private class Pair {
		int n, m;

		public Pair(int n, int m) {
			this.n = n;
			this.m = m;
		}

		@Override
		public boolean equals(Object o) {
			if (!(o instanceof Pair)) return false;
			Pair p = (Pair) o;
			if (this.n != p.n) return false;
			if (this.m != p.m) return false;
			return true;
		}

		@Override
		public int hashCode() {
			return (n + m) % 3571;
		}
	}
}
