题解 | #一大一小#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a = 0;
        int b = 0;
        while (in.hasNext()) {
            a = in.nextInt();
            b = in.nextInt();
        }
        System.out.println(b + "\n" + a);
    }
}