Which of the following is NOT a characteristic of a good algorithm? Efficiency Clarity Complexity Optimality

To determine which of the options is NOT a characteristic of a good algorithm, let's analyze each one:

1. Efficiency: This refers to how well an algorithm utilizes resources, particularly time and space. A good algorithm should solve the problem quickly and with minimal resource consumption.

2. Clarity: A well-defined algorithm should be easy to understand. Clarity helps developers and users comprehend the algorithm’s purpose and function.

3. Complexity: While algorithms can be complex in their logic, a good algorithm is typically expected to simplify complexity wherever possible. High complexity without necessity is usually viewed negatively in algorithm design.

4. Optimality: This refers to the algorithm's ability to provide the best possible solution to a problem among all possible solutions. An optimal algorithm is one that achieves the best outcome in terms of specified criteria.

Based on this analysis, the characteristic that is NOT necessarily a feature of a good algorithm is Complexity. Good algorithms strive for simplicity and should not be unnecessarily complex.