Value at index n

Return the value at zero-based index n or None if out of range.

linked-list lists pointers

Implement `value_at(values: list, n: int)` returning the nth payload or `None` when `n` is invalid.

Constraints

0 ≤ list lengths ≤ 10_000 unless noted.

Example

>>> value_at(...)
# 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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