​​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 in = new Scanner(System.in);
        while(in.hasNext()){
            String str = in.nextLine();
            int count=0;
            for(int i=str.length()-1;i>=0;i--){
                if(str.charAt(i) == ' '){
                    break;
                }
                count++;
            }
            System.out.println(count);
        }
    }
}