String

题目：28. Implement strStr() # Implement strStr().

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. For example, Given s = “Hello World”, return 5.

题目：Reverse Words in a String # Given an input string s, reverse the string word by word. For example, given s = “the sky is blue”, return “blue is sky the”.