• DisappearedNumbers: Excellent solution. The approach of marking indices as negative is efficient and clever. The code is clean and easy to understand.
• GameOfLife: Well done. The use of temporary states (2 and 3) is a smart way to handle in-place updates. The helper function getCount is well-implemented.
• MinAndMax: Good implementation of the pair comparison method. One minor suggestion: consider using more descriptive variable names for the loop index (e.g., index instead of i) to enhance readability, though it is acceptable in this context.

Overall, the student demonstrates a strong understanding of algorithms and efficient coding practices. The solutions are optimal in terms of time and space complexity.