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: The maximum value for a u8 is 255. Adding 200 + 100 produces 300, which overflows the integer range and causes a panic in debug mode (or wraps unexpectedly in release mode).
The fix: Use a.saturating_add(b) to cap the result safely at 255, or use checked_add.
Remember: Rust strictly checks integer arithmetic for overflow in debug builds. Use saturating_add, wrapping_add, or checked_add when arithmetic can exceed bounds.
The pattern behind it: logic errors.
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