题解 | #句子逆序#

import java.util.Scanner;

/**
 * @author hll[yellowdradra@foxmail.com]
 * @since 2023-03-14 14:26
 **/
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextLine()) {
            recursive(in.nextLine());
            System.out.println();
        }
    }

    public static void recursive(String str) {
        int lastSpaceIndex = str.lastIndexOf(' ');
        if (lastSpaceIndex < 0) {
            System.out.print(str);
        } else {
            System.out.print(str.substring(lastSpaceIndex + 1, str.length()) + " ");
            recursive(str.substring(0, lastSpaceIndex));
        }
    }
}