/*
 * 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;
	}

}

package codejam.recyclednumbers;

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

public class DigitsArray implements Comparable<DigitsArray> {

	private int[] digits;

	private DigitsArray() {
	}

	public DigitsArray(String numberAsString) {
		char[] charArray = numberAsString.toCharArray();
		this.digits = new int[charArray.length];
		for (int i = 0; i < digits.length; i++) {
			digits[i] = Integer.parseInt("" + charArray[i]);
		}
	}

	public DigitsArray(int[] digits) {
		this.digits = digits;
	}

	public DigitsArray(Integer number) {
		this(number.toString());
	}

	public int numberRecycles(DigitsArray minValue, DigitsArray maxValue) {
		Set<DigitsArray> correctRecycles = new HashSet<>();
		for (int i = 1; i < digits.length; i++) {
			if (digits[i] < digits[0] || digits[i] < minValue.digits[0]
					|| digits[i] > maxValue.digits[0]) {
				continue;
			}
			DigitsArray recycle = recycle(i);
			if (recycle.compareTo(this) > 0 && recycle.compareTo(minValue) >= 0
					&& recycle.compareTo(maxValue) <= 0) {
				correctRecycles.add(recycle);
			}
		}
		return correctRecycles.size();
	}

	private DigitsArray recycle(int recycleIndex) {
		DigitsArray result = new DigitsArray();
		int length = digits.length;
		result.digits = new int[length];
		for (int i = 0; i < length; i++) {
			result.digits[i] = digits[(i + recycleIndex) % length];
		}
		return result;
	}

	@Override
	public int compareTo(DigitsArray o) {
		if (digits.length > o.digits.length) {
			return 1;
		}
		if (digits.length < o.digits.length) {
			return -1;
		}
		for (int i = 0; i < digits.length; i++) {
			if (digits[i] > o.digits[i]) {
				return 1;
			}
			if (digits[i] < o.digits[i]) {
				return -1;
			}
		}
		return 0;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + Arrays.hashCode(digits);
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		DigitsArray other = (DigitsArray) obj;
		if (!Arrays.equals(digits, other.digits))
			return false;
		return true;
	}

}
