Maximum node value

Return the largest integer or None when empty.

linked-list lists pointers

Implement `list_max(values: list[int])` returning the maximum payload or `None` for an empty list.

Constraints

0 ≤ list lengths ≤ 10_000 unless noted.

Example

>>> list_max(...)
# see tests

10 points ~12 min

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Hints

Work on paper with a tiny list first.

Match the function signature exactly.

Test Results

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