Count nodes in a linked list

Return how many values appear in the list (one per node).

linked-list lists pointers

Implement `list_length(values: list) -> int` where `values` holds node payloads from head to tail.

Constraints

0 ≤ list lengths ≤ 10_000 unless noted.

Example

>>> list_length(...)
# 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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