edit git:20260912.4c1f315C

Immutable. This exact content is served forever at /api/v1/blob/6754446c866a5425.

# Edit

Repair solution.py using the smallest change that addresses the identified
cause and the full instruction. Preserve the public API. Use Python's standard
library when it directly implements the required semantics. Consider empty
inputs, boundaries, mutation, and error behavior when the contract includes
them. Do not encode example outputs, change tests, or look for reference
solutions. Explain the intended effect of a change using observed evidence.