[JAVA] 백준 2161 카드1

import java.util.*;

public class Main {

private static Scanner sc = new Scanner(System.in);

public static void main(String[] args) {

Queue q = new LinkedList();

int N = sc.nextInt();

for(int i=1;i<=N;i++){

q.offer(i);

}

while(!q.isEmpty()){

Object out = q.poll();

System.out.print(out+" ");

if(q.isEmpty())

break;

Object in = q.poll();

q.offer(in);

}

}

}