Status: IN
`most_common(1)[0][0]` is the standard idiom across this repo's frequency-based solutions to extract the mode element from a `Counter` — first `[0]` selects the top `(element, count)` tuple, second `[0]` extracts the element.
Source: entries/2026/06/06/most-frequent-number-following-key-in-an-array-solution.md