题解 | #字符串最后一个单词的长度#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        for(int i = str.length()-1;i>=0;i--){
            if(str.charAt(i)==' '){
                System.out.println(str.length()-i-1);
                return;
            }
        }
        System.out.println(str.length());
    }
}