[ADS] Card Trick

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Stack;


public class card_trick {
    public static int count(int N){

        int count = 0;
        Stack<Integer> hand = new Stack<>();
        Queue <Integer> deck = new LinkedList<>();
        for(int i = 1 ; i < 52 ; i++){
            deck.add(i);
        }
        while(deck.peek() != N){
            for(int i = 0; i < 7 ; i++){
                hand.push(deck.poll());

            }
            for(int i = 0 ; i < 7 ; i ++){
                Integer fromHand = hand.pop();
                Integer fromDeck = deck.poll();
                deck.add(fromHand);
                deck.add(fromDeck);
            }
            count++;
        }
        return count;
    }

    public static void main(String[] args) throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in) );
        System.out.println(count(Integer.parseInt(br.readLine())));
    }

}