/*
 * 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 de.johanneslauber.codejam;

import java.io.IOException;

/**
 * 
 * @author Johannes Lauber - joh.lauber@googlemail.com
 * 
 */
public class Main {

	/**
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param Args
	 */
	public static void main(String[] Args) {
		long millis = System.currentTimeMillis();

		// solveProblem("input/A-small-practice.in", "StoreCredit");
		// solveProblem("input/A-large-practice.in", "StoreCredit");
		// solveProblem("input/B-small-practice.in", "ReverseWords");
		// solveProblem("input/B-large-practice.in", "ReverseWords");
		// solveProblem("input/C-small-practice.in", "T9Spelling");
		// solveProblem("input/C-large-practice.in", "T9Spelling");
		// solveProblem("input/A-small-practice.in", "SpeakinginTongues");
		// solveProblem("input/B-large.in", "DancingGooglers");
		solveProblem("input/C-small-attempt.in", "RecycledNumbers");

		System.out.println(System.currentTimeMillis() - millis);
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param fileName
	 * @param problemName
	 */
	private static void solveProblem(String fileName, String problemName) {
		CaseProvider caseProvider = new CaseProvider();
		try {
			try {
				caseProvider.importFile(
						fileName,
						Class.forName("de.johanneslauber.codejam.model.impl."
								+ problemName + "Case"));

				caseProvider.solveCases(Class
						.forName("de.johanneslauber.codejam.model.impl."
								+ problemName + "Problem"));
			} catch (ClassNotFoundException e) {
				System.out.println("Error finding implemented Case: "
						+ e.getMessage());
			} catch (InstantiationException e) {
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				e.printStackTrace();
			}
		} catch (IOException e) {
			System.out.println("Error reading file: " + e.getMessage());
		}
	}
}