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@ankitakulkarnigit
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@super30admin
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Strengths:

  • You have correctly identified the use of binary search for this problem, which is a good approach for achieving O(log n) time complexity.
  • The code is well-structured and readable, with appropriate comments.
  • You handle the edge case where the array length is 1, which shows attention to detail.

Areas for Improvement:

  • The logic for determining the missing number is incorrect. The condition arr[mid] == mid+1 assumes that the array starts at 1, but this doesn't correctly identify the missing number in all cases.
  • The final conditions to return the missing number are also flawed. For example, if the missing number is at the beginning or end of the array, your solution will not return the correct result.
  • Consider using the difference between the index and the value to identify the missing number, as shown in the reference solution. This approach is more reliable.

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2 participants