[Missing Number problem]

[takchiks]

No description provided.

[super30admin]

Your solution is well-implemented and correct. You have successfully applied binary search to solve the problem in O(log n) time and constant space. The code is clean and easy to follow.

Strengths:

• Correct handling of all cases, including edge cases.
• Efficient algorithm with optimal time and space complexity.
• Good variable naming and use of standard binary search implementation.

Areas for improvement:

• Consider adding comments to explain the logic, especially the condition used in the binary search. For example, you could note that you are looking for the first index where arr[i] != i+1.
• Although not necessary, you might want to consider adding a check for an empty array. However, the problem states the array has n-1 integers, so it's not empty.

Overall, excellent job!

[super30admin]

Your solution for Problem1.java is correct and efficient. It correctly implements binary search to find the missing number in O(log n) time and O(1) space. The code is clean and easy to understand. However, note that the problem statement only asks for the missing number problem, so including an unrelated min heap implementation (Problem2.java) might be a mistake. If you intended to submit two solutions, ensure that both are relevant to the problem. For the missing number problem, your solution is excellent.