题解 | #句子逆序#split(" ")，转换成String数组，拼接即可，记得去空格

public class Main{
    public static void main(String[] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        String str;
        while((str = bf.readLine())!= null){
            String[] res = str.split(" ");
            StringBuffer sb = new StringBuffer();
            for(int i = res.length - 1;i >= 0;i--){
                sb.append(" " + res[i]);
            }
            sb.deleteCharAt(0);
            System.out.println(sb.toString());
                
        }
    }
}