LeetCode_58. Length of Last Word

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58. Length of Last Word

Easy

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

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来源：https://www.cnblogs.com/denggelin/p/11576934.html