Create MissingNumberInSortedArray.cpp

[sujaygijre]

No description provided.

[super30admin]

Strengths:

• The solution is correct and efficient, using binary search to achieve logarithmic time complexity.
• The code is clean, well-structured, and easy to read.
• Variable names are meaningful (a, b, mid are conventional for binary search).
• The solution handles edge cases implicitly (e.g., when the missing number is at the beginning or end) because the algorithm narrows down to adjacent indices.

Areas for improvement:

• While the code is correct, it might be helpful to add comments to explain the logic, especially the condition (ar[a] - a) != (ar[mid] - mid), which is key to understanding how the missing number is detected.
• Consider adding a check for the case when the array is empty (size 0) to avoid potential issues, though the problem states the array has n-1 integers.
• The solution assumes the array is sorted and contains distinct integers in the range 1 to n, which is given, so no additional validation is needed. However, in a real-world scenario, you might want to validate input assumptions if required.

Overall, this is an excellent solution that meets all the problem requirements.