题解 | #首尾交替出队#

import java.util.ArrayDeque; import java.util.Scanner;

public class Main {

public static void main(String[] args) {
    ArrayDeque deque = new ArrayDeque();

    Scanner scanner = new Scanner(System.in);
    while (scanner.hasNext()) {
        String name = scanner.next();
        // 初始化队列中的数据
        deque.offerLast(name);
    }

    // write your code here......
    for(int i = 1 ; deque.size() != 0 ; i++){
        if(i % 2 == 0){
            System.out.println(deque.pollLast());
        }else{
            System.out.println(deque.pollFirst());
        }
    }
    
}

}