The power of the string is the maximum length of a non-empty substring that contains only one unique character.
Given a string s, return the power of s.
Example 1:
Input: s = "leetcode"Output: 2Explanation: The substring "ee" is of length 2 with the character 'e' only.
Example 2:
Input: s = "abbcccddddeeeeedcba"Output: 5Explanation: The substring "eeeee" is of length 5 with the character 'e' only.
Constraints:
1 <= s.length <= 500 s consists of only lowercase English letters. 所有代码均可在Github中找到：