//******************************************************************************
// creates carddeck and return cards till empty
//******************************************************************************

import java.lang.Math;

public	class HridayeshCardDeck {
	private	boolean[]	deck; // card deck containing 52 cards

	public	HridayeshCardDeck() {
		deck = new boolean[52];
		reset();
	}

	public void reset() {
		int	i;
		for(i = 0; i < 52; i++) deck[i] = true; // initialize the card deck
	}

	public	int newCard() {
		int	i, rNum;
		int	cardsLeft;
		for(i = 0, cardsLeft = 0; i < 52; i++) {
			if (deck[i]) cardsLeft++;
		}
		if(cardsLeft == 0) return -1;	// empty deck		
		rNum = (int)(Math.random() * cardsLeft);
		for(i = 0; i < 52; i++) {
			if (deck[i]) {
				rNum--;
				if (rNum < 0) {
					deck[i] = false;
					return i; // This is the rNum'th card on the deck
				}
			}
		}
		// GOD save us if we ever reach this place
		return -1;
	}
}