Given a string s, the power of the string is the maximum length of a non-empty substring that contains only one unique character.
Return the power of the string.
Example 1:
Input: s = "leetcode" Output: 2 Explanation: The substring "ee" is of length 2 with the character 'e' only.
Example 2:
Input: s = "abbcccddddeeeeedcba" Output: 5 Explanation: The substring "eeeee" is of length 5 with the character 'e' only.
Example 3:
Input: s = "triplepillooooow" Output: 5
Example 4:
Input: s = "hooraaaaaaaaaaay" Output: 11
Example 5:
Input: s = "tourist" Output: 1
Constraints:
1 <= s.length <= 500scontains only lowercase English letters.