You are given a binary string s. An operation consists of changing any character in s from '$0$' to '$1$' or from '$1$' to '$0$'.

A string is considered alternating if no two adjacent characters are identical.

Return the minimum number of operations needed to make s alternating.

Constraints:

• $1 \leq$ s.length $\leq 10^4$

• s[i] is either '$0$' or '$1$'.

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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.