package fixjava;

public class StringUtils {

	/** Repeat the given string the requested number of times. */
	public static String repeat(String str, int numTimes) {
		StringBuilder buf = new StringBuilder(Math.max(0, str.length() * numTimes));
		for (int i = 0; i < numTimes; i++)
			buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the left hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padLeft(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(padChar);
		for (int i = 1, mi = bufSize - str.length(); i < mi; i++)
			buf.append(padChar);
		buf.append(str);
		return buf.toString();
	}

	/**
	 * Pad the right hand side of a field with the given character. Always adds at least one pad character. If the length of str is
	 * greater than numPlaces-1, then the output string will be longer than numPlaces.
	 */
	public static String padRight(String str, char padChar, int numPlaces) {
		int bufSize = Math.max(numPlaces, str.length() + 1);
		StringBuilder buf = new StringBuilder(Math.max(numPlaces, str.length() + 1));
		buf.append(str);
		buf.append(padChar);
		while (buf.length() < bufSize)
			buf.append(padChar);
		return buf.toString();
	}

	/** Intern all strings in an array, skipping null elements. */
	public static String[] intern(String[] arr) {
		for (int i = 0; i < arr.length; i++)
			arr[i] = arr[i].intern();
		return arr;
	}

	/** Intern a string, ignoring null */
	public static String intern(String str) {
		return str == null ? null : str.intern();
	}

}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class RecycledNumbers {

	public static void main(String[] args) {
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(
					System.in));
			String str = "";

			// Testcases
			str = in.readLine();
			int cases = Integer.valueOf(str);
			List<String> output = new ArrayList<String>();

			CalculatorThread[] threads = new CalculatorThread[cases];

			long start = System.nanoTime();

			for (int i = 0; i < cases; i++) {

				str = in.readLine();

				String[] numbers = str.split(" ");

				int a = Integer.valueOf(numbers[0]);
				int b = Integer.valueOf(numbers[1]);

				CalculatorThread t = new CalculatorThread(a, b);
				t.start();
				threads[i] = t;
				
				if((i + 1) % 4 == 0) {
					try {
						t.join();
					} catch (InterruptedException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
				}

			}

			System.out.println("waiting for threads");
			
			for (CalculatorThread t : threads) {
				
				try {
					t.join();
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}

			}

			for (int i = 0; i < threads.length; i++) {
				output.add("Case #" + (i + 1) + ": " + threads[i].getSolution());
			}

			long end = System.nanoTime();
			float duration = ((float) end - start) / 1000 / 1000 / 1000;
			System.out.println("Duration: " + duration);

			for (String outputLine : output) {
				System.out.println(outputLine);
			}

		} catch (IOException e) {
		}
	}

}
