/*
 * 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 RecycledNumbers;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.Hashtable;

import DancingWithGooglers.Googler;



public class MainProcess {

	/**
	 * @param args
	 */
	
	private int A ;
	private int B ;
	
	public MainProcess(File f){
		readFile(f);
		
	}
	
	private void readFile(File f){
		
		int numCase = 0;
		
		try {
			FileReader fr = new FileReader(f);
			BufferedReader br = new BufferedReader(fr);
			
			String str = "";
			
			if( (str = br.readLine())!=null){
				numCase = Integer.parseInt(str);
			}
			
			int count = 0;
			while( count < numCase){
				str = br.readLine();
				String[] substr = str.split(" ");
				A = Integer.parseInt(substr[0]); 
				B = Integer.parseInt(substr[1]); 
				
				findAns(count ,substr[0].length());
				count++;
			}
			
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

	private void findAns(int count , int numDigit){
		
		int totalPair=0;
		
		if(numDigit<=1){
			System.out.println("Case #" + (count+1) + ": 0");
		}
		else{
			
			for(int i=A ; i<=B ; i++){
				totalPair += findPair(i , numDigit);
			}
			
			System.out.println("Case #" + (count+1) + ": " + totalPair);
		}
	}
	
	private int findPair(int number , int numDigit){
		Hashtable<Integer , Boolean> usedTable = new Hashtable<Integer , Boolean>();
		
		int numPair =0;
		
		for(int i=1 ; i<numDigit ; i++ ){
			int base = getPower(i);
			int secondPart = number % base;
			int firstPart = (number - secondPart) / base;
			
			int newNumber = secondPart*getPower(numDigit - i) + firstPart;
			
			if(newNumber<=B && newNumber > number){
				if(!usedTable.containsKey(newNumber)){
					numPair++;
					usedTable.put(newNumber, true);
				}

			}
		}
		
		return numPair;
	}
	
	private int getPower(int n){
		int number = 1;
		
		if(n==0) return number;
		else{
			for(int i=0 ; i< n ; i++){
				number *=10;
			}
			
			return number;
		}
	}

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		File f = new File(".\\src\\RecycledNumbers\\C-small-attempt0.in");
		MainProcess m = new MainProcess(f);
	}

}
