1446\. Consecutive Characters

Easy

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:** 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.

**Constraints:**

*   `1 <= s.length <= 500`
*   `s` consists of only lowercase English letters.