/*
 * 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 hk.polyu.cslhu.codejam.solution.impl.qualificationround;

import java.util.List;

import hk.polyu.cslhu.codejam.solution.Solution;

public class RecycledNumbers extends Solution {
	private int min, max;
	
	@Override
	public void setProblem(List<String> problemDesc) {
		// TODO Auto-generated method stub
		String[] splitArray = problemDesc.get(0).split(" ");
		this.min = Integer.valueOf(splitArray[0]);
		this.max = Integer.valueOf(splitArray[1]);
	}

	@Override
	public void solve() {
		// TODO Auto-generated method stub
		int numOfPairs = 0;
		
		for (int i = this.min; i < this.max; i++) {
			for (int j = i + 1; j <= this.max; j++) {
				if (this.isRecycledPair(i, j))
					numOfPairs++;
			}
		}
		
		this.result = String.valueOf(numOfPairs);
	}

	private boolean isRecycledPair(int i, int j) {
		// TODO Auto-generated method stub
		
		if (i >= j)
			return false;
		
		String m = String.valueOf(j);
		String n = String.valueOf(i);
		
		for (int startIndex = 1; startIndex < n.length(); startIndex++) {
			String partToMove = n.substring(startIndex, n.length());
			String newString = partToMove + n.substring(0, startIndex);
			
			if (newString.equals(m))
				return true;
		}
		
		return false;
	}

}
