题解 | #句子逆序#

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);
        String str = in.nextLine().trim();
        String[] split = str.split(" ");
        int n = split.length;
        StringBuilder builder = new StringBuilder();
        for(int i=n-1;i>=0;i--){
            builder.append(split[i]+" ");
        }
        System.out.println(builder.toString());
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            int b = in.nextInt();
            System.out.println(a + b);
        }
    }
}