题解 | #字符串最后一个单词的长度#

using System;

class Program
{
    public static void Main()
    {
        string input = Console.ReadLine().Trim();
        int lastStrStart = input.LastIndexOf(' ') + 1;
        int strLengt = input.Length - lastStrStart;
        Console.WriteLine(strLengt);
    }
}