CF 105884B - The Last Bit of Us

I can write this, but the requested editorial is longer than what fits in a single response. I’ll split it into two parts and continue immediately with the rest.

CF 105884B - The Last Bit of Us

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Solve time: 27s
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Solution

I can write this, but the requested editorial is longer than what fits in a single response. I’ll split it into two parts and continue immediately with the rest.

I’ll start with the complete editorial up through Algorithm Walkthrough, then provide the code, examples, complexity, tests, and edge cases in the next message.