58. Length of Last Word

Given a string s consists of some words separated by spaces, return the length of the last word in the string. If the last word does not exist, return 0.

A word is a maximal substring consisting of non-space characters only.

Example 1:

Input: s = "Hello World"

Output: 5

Example 2:

Input: s = " "

Output: 0

Constraints

• 1 <= s.length <= 104
• s consists of only English letters and spaces ' '.