Leetcode刷题C#版之 Length of Last Word

题目：

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

Example:

Input: "Hello World"
Output: 5

C#版本的代码如下（关键步骤已经注释）：

 public static int LengthOfLastWord(string s)
        {
            //将字符串分隔开
            string[] midtest = s.Split(' ');
            int result=0;
            //从最末尾一个开始向前搜索第一个非空值
            for (int i = midtest.Length - 1; i >= 0; i--)
            {
                string test = midtest[i];
                //找到第一个不为空的情况
                if (!string.IsNullOrEmpty(test))
                {
                    result = test.Length;
                    break;
                }
            }
            return result;
        }

再次运行时间为最少的，小嘚瑟，哈哈