/*
 * 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 quiz2012.quiz3;

import java.util.HashSet;
import java.util.Set;

import domain.QuizSolver;
import domain.QuizTestCaseInput;
import domain.QuizTestCaseOutput;

public class Quiz3Solver implements QuizSolver {
	@Override
	public QuizTestCaseOutput solve(QuizTestCaseInput testCaseInput) {
		Quiz3TestCaseInput input = (Quiz3TestCaseInput) testCaseInput;

		int numberOfRecycledPairs = 0;

		int n = input.getN();
		String nAsString = String.valueOf(n);
		int numberOfDigitsOfN = nAsString.length();
		int m = input.getM();

		// TODO: Remove if the following case can be generalized.
		if (numberOfDigitsOfN == 1) {
			return new Quiz3TestCaseOutput(numberOfRecycledPairs);
		}

		for (int i = n; i < m; i++) {
			Set<Integer> recycledValueSet = new HashSet<Integer>();
			for (int j = 1; j < numberOfDigitsOfN; j++) {
				int recycledValue = shiftDigitsLeft(i, j);
				if (recycledValue > i && recycledValue <= m) {
					recycledValueSet.add(recycledValue);
					System.out.println(i + ", " + recycledValue);
				}
			}

			numberOfRecycledPairs += recycledValueSet.size();
		}
		return new Quiz3TestCaseOutput(numberOfRecycledPairs);
	}

	public int shiftDigitsLeft(int n, int numberOfShifts) {
		String nAsString = String.valueOf(n);
		StringBuffer sb = new StringBuffer();
		int numberOfDigitsOfN = nAsString.length();
		for (int i = 0; i < numberOfDigitsOfN; i++) {
			sb.append(nAsString.charAt((numberOfDigitsOfN + i - numberOfShifts)
					% numberOfDigitsOfN));
		}
		return Integer.valueOf(sb.toString());
	}
}
