Time: 0:00
Test a custom input to verify an edge case (e.g. empty lists, negative numbers, duplicates).
This bug belongs to the logic errors pattern
The wrong operator, an inverted condition, a formula the right way round but backwards.
What went wrong: Calling min() on an empty iterable raises ValueError when no default argument is provided.
The fix: Provide the default keyword argument: min(fees, default=0)
Remember: In Python, pass default=value to min() and max() to prevent exceptions on empty inputs.
The pattern behind it: logic errors.
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