/*
 * Problem C. Recycled Numbers
 * 
 * Do you ever become frustrated with television because you keep seeing the
 * same things, recycled over and over again? Well I personally don't care about
 * television, but I do sometimes feel that way about numbers.
 * 
 * Let's say a pair of distinct positive integers (n, m) is recycled if you can
 * obtain m by moving some digits from the back of n to the front without
 * changing their order. For example, (12345, 34512) is a recycled pair since
 * you can obtain 34512 by moving 345 from the end of 12345 to the front. Note
 * that n and m must have the same number of digits in order to be a recycled
 * pair. Neither n nor m can have leading zeros.
 * 
 * Given integers A and B with the same number of digits and no leading zeros,
 * how many distinct recycled pairs (n, m) are there with A â¤ n < m â¤ B?
 * 
 * Input
 * 
 * The first line of the input gives the number of test cases, T. T test cases
 * follow. Each test case consists of a single line containing the integers A
 * and B.
 * 
 * Output
 * 
 * For each test case, output one line containing "Case #x: y", where x is the
 * case number (starting from 1), and y is the number of recycled pairs (n, m)
 * with A â¤ n < m â¤ B.
 * 
 * Limits
 * 
 * 1 â¤ T â¤ 50.
 * 
 * A and B have the same number of digits.

Small dataset

1 â¤ A â¤ B â¤ 1000.

Large dataset

1 â¤ A â¤ B â¤ 2000000.

Sample


Input 
 	
Output 
 
4
1 9
10 40
100 500
1111 2222
Case #1: 0
Case #2: 3
Case #3: 156
Case #4: 287
 */

package google.codejam.y2012.qualifications;

import google.codejam.commons.Utils;

import java.io.IOException;
import java.util.StringTokenizer;

/**
 * @author Marco Lackovic <marco.lackovic@gmail.com>
 * @version 1.0, Apr 14, 2012
 */
public class RecycledNumbers {

	private static final String INPUT_FILE_NAME = "C-large.in";
	private static final String OUTPUT_FILE_NAME = "C-large.out";

	public static void main(String[] args) throws IOException {
		String[] input = Utils.readFromFile(INPUT_FILE_NAME);
		String[] output = new String[input.length];
		int x = 0;
		for (String line : input) {
			StringTokenizer st = new StringTokenizer(line);
			int a = Integer.valueOf(st.nextToken());
			int b = Integer.valueOf(st.nextToken());
			System.out.println("Computing case #" + (x + 1));
			output[x++] = "Case #" + x + ": " + recycledNumbers(a, b);
		}
		Utils.writeToFile(output, OUTPUT_FILE_NAME);
	}

	private static int recycledNumbers(int a, int b) {
		int count = 0;
		for (int n = a; n < b; n++) {
			count += getNumGreaterRotations(n, b);
		}
		return count;
	}

	private static int getNumGreaterRotations(int n, int b) {
		int count = 0;
		char[] chars = Integer.toString(n).toCharArray();
		for (int i = 0; i < chars.length; i++) {
			chars = rotateRight(chars);
			if (chars[0] != '0') {
				int m = Integer.valueOf(new String(chars));
				if (n == m) {
					break;
				} else if (n < m && m <= b) {
					count++;
				}
			}
		}
		return count;
	}

	private static char[] rotateRight(char[] chars) {
		char last = chars[chars.length - 1];
		for (int i = chars.length - 2; i >= 0; i--) {
			chars[i + 1] = chars[i];
		}
		chars[0] = last;
		return chars;
	}

}

ï»¿import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

/*
 * Google Code Jam 2012
 * Qualification 2012
 * raguenets@gmail.com
 * Usage : java RecycledNumbers inputFileName outputFileName
 */
public class RecycledNumbers {

  public static void main(String[] args) {
    int T = 0;
    int A = 0;
    int B = 0;

    if (args.length == 2) {
      String inputFilename = args[0];
      File finput = new File(inputFilename);
      String outputFilename = args[1];
      File foutput = new File(outputFilename);
      Scanner scanner = null;
      BufferedWriter bw = null;
      try {
        bw = new BufferedWriter(new FileWriter(foutput));
      }
      catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
      }
      if (finput.exists()) {
        try {
          scanner = new Scanner(finput);
          // Reads first line : number of Tests
          if (scanner.hasNextInt()) {
            T = scanner.nextInt();
            scanner.nextLine();
          }
          for (int i = 0; i < T; i++) {
            // Read number of flies
            A = scanner.nextInt();
            B = scanner.nextInt();
            // Read fly positions
            bw.write("Case #" + (i + 1) + ": " + numberOfRecycled(A, B) + "\n");
          }
        }
        catch (FileNotFoundException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
        catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
        finally {
          try {
            bw.close();
            if (scanner != null) {
              scanner.close();
            }
          }
          catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }
      }
    }
  }

  public static int[] getDigits(int number) {
    List<Integer> digits = new ArrayList<Integer>();
    while (number > 0) {
      digits.add(number % 10);
      number = (number - number % 10) / 10;
    }
    int[] d = new int[digits.size()];
    for (int i = 0; i < digits.size(); i++) {
      d[i] = digits.get(digits.size() - 1 - i);
    }
    return d;
  }

  public static int getValue(int[] digits) {
    int value = 0;
    for (int i = 0; i < digits.length; i++) {
      value += digits[i];
      if (i != digits.length - 1) {
        value *= 10;
      }
    }
    return value;
  }

  public static int numberOfRecycled(int A, int B) {
    if (B < 10) {
      return 0;
    }
    else {
      int count = 0;
      for (int i = A; i < B; i++) {
        int[] digits = getDigits(i);
        Set<Integer> set = new HashSet<Integer>();
        for (int j = 1; j < digits.length; j++) {
          int[] newDigits = new int[digits.length];
          for (int k = 0; k < digits.length; k++) {
            newDigits[k] = digits[(k + j) % digits.length];
          }
          int value = getValue(newDigits);
          if (value <= B && value > i) {
            set.add(value);
//            count++;
          }
        }
        for (Integer val:set) {
          count++;
        }
      }
      return count;
    }
  }
}
