/*
 * 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.BufferedReader;
import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import de.johanneslauber.codejam.model.ICase;
import de.johanneslauber.codejam.model.IProblem;

/**
 * provids the cases for a problem
 * 
 * @author Johannes Lauber - joh.lauber@googlemail.com
 * 
 */
public class CaseProvider {

	private int numberOfCases;
	private List<ICase> listOfCases;

	/**
	 * Read the file line by line and write it to a list of cases
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param fileName
	 * @throws IOException
	 * @throws IllegalAccessException
	 * @throws InstantiationException
	 */
	public void importFile(String fileName, Class caseClass)
			throws IOException, InstantiationException, IllegalAccessException {

		BufferedReader reader = new BufferedReader(new InputStreamReader(
				new DataInputStream(new FileInputStream(fileName))));

		// Read File Line By Line
		String stringLine = reader.readLine();
		setNumberOfCases(Integer.valueOf(stringLine));

		List<ICase> listOfCases = new ArrayList<ICase>();
		ICase currentCase = createEmptyCase(caseClass);

		int i = 1;
		while ((stringLine = reader.readLine()) != null) {

			if (i <= currentCase.getNumberOfAttributes()) {
				currentCase.setLine(i, stringLine);
				i++;
			} else {
				listOfCases.add(currentCase);
				currentCase = createEmptyCase(caseClass);
				i = 1;
				currentCase.setLine(i, stringLine);
				i++;
			}
		}
		// don't forget to add the last case
		listOfCases.add(currentCase);

		reader.close();

		this.listOfCases = listOfCases;
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param caseClass
	 * @throws IllegalAccessException
	 * @throws InstantiationException
	 */
	private ICase createEmptyCase(Class<ICase> caseClass)
			throws InstantiationException, IllegalAccessException {
		ICase currentCase = caseClass.newInstance();
		return currentCase;
	}

	/**
	 * 
	 * @author Johannes Lauber - joh.lauber@googlemail.com
	 * @param forName
	 */
	public void solveCases(Class<?> forName) {

		try {
			IProblem problem = (IProblem) forName.newInstance();
			problem.setListOfCases(listOfCases);
			problem.solveCases();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	// Setter & Getter
	public int getNumberOfCases() {
		return numberOfCases;
	}

	public void setNumberOfCases(int numberOfCases) {
		this.numberOfCases = numberOfCases;
	}

	public List<ICase> getListOfCases() {
		return listOfCases;
	}

	public void setListOfCases(List<ICase> listOfCases) {
		this.listOfCases = listOfCases;
	}

}
