Given a string s, the power of the string is defined as the maximum length of a non empty substring that contains only one unique character.

Return the power of s.

Constraints:

• $1 \leq$ s.length $\leq 500$

• s consists of only lowercase English letters.

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We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.