/*
 * 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 wwu.quals2012;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import lib.tuple.Pair;
import lib.tuple.Tuple;
import lib.util.StringUtil;

public class Crecycled {

	static final String fileIn = "/home/wwu/Desktop/C-small-attempt0.in";
//	static final String fileIn = "data/A-large-practice.in";
	static final String fileOut = "/home/wwu/Desktop/out.txt";
	
	public static Map<String, String> charMap;

	public static void main(String[] args) throws Exception {
		BufferedReader r = new BufferedReader(new FileReader(fileIn));
		BufferedWriter w = new BufferedWriter(new FileWriter(fileOut));
		String line = r.readLine();
		int T = Integer.parseInt(line);
		for (int caseNum = 0; caseNum < T; caseNum++) {
			int[] testCase = StringUtil.getIntArray(r.readLine());
			int A = testCase[0];
			int B = testCase[1];
			String str = "Case #" + (caseNum + 1) + ": " + solve(A, B);
			w.write(str + "\n");
			System.out.println(str);
		}
		r.close();
		w.close();
	}

	private static String solve(int a, int b) {
		int numRecyled = 0;
		for (int outerCompare=a; outerCompare<=b; outerCompare++) {
			numRecyled += getRecycledPairNum(outerCompare, a, b);
//			for (int innerCompare=a; innerCompare<=b; innerCompare++) {
//				if (isRecycledPair(outerCompare, innerCompare)) {
//					numRecyled++;
//				}
//			}
		}
		return String.valueOf(numRecyled/2);
	}

	private static int getRecycledPairNum(int outerCompare, int a, int b) {
		int retVal = 0;
		int lenOfOuter = String.valueOf(outerCompare).length();
		int nextRecycledNum = (int) Math.pow(10, lenOfOuter-1)*(outerCompare % 10) + outerCompare/10;
		for (int i=0; i<=lenOfOuter; i++) {
			if (outerCompare == nextRecycledNum) {
				continue;
			} else if (nextRecycledNum >= a && nextRecycledNum <= b) {
				retVal++;
			}
			nextRecycledNum = (int) Math.pow(10, lenOfOuter-1)*(nextRecycledNum % 10) + nextRecycledNum/10;
		}
		return retVal;
	}

//	private static boolean isRecycledPair(int outerCompare, int innerCompare) {
//		// 123 -> 312
//		int lenOfOuter = String.valueOf(outerCompare).length();
//		int nextRecycledNum = (int) Math.pow(10, lenOfOuter-1)*(outerCompare % 10) + outerCompare/10;
//		for (int i=0; i<=lenOfOuter; i++) {
//			if (outerCompare == innerCompare) {
//				continue;
//			} else if (nextRecycledNum == innerCompare) {
//				return true;
//			}
//			nextRecycledNum = (int) Math.pow(10, lenOfOuter-1)*(nextRecycledNum % 10) + nextRecycledNum/10;
//		}
//		return false;
//	}
//	

}
