Therefore, Linear Search is used for searching in an unsorted array, not Binary Search. So the total time complexity to search any element here is O((M * N) log(M * N)) + O(N + M) which very poor when it is compared with the time complexity of Linear Search which is just O(N*M). To apply Binary Search first the 2D array needs to be sorted in any order that itself takes (M*N)log(M*N) time. Here is an unsorted 2D array is given, so applying Binary Search in an unsorted array is not possible.
To perform a Binary search in the 2D array, the array needs to be sorted. The basic condition to apply Binary Search anywhere in any algorithm is that the search space should be sorted. Why Binary Search is not useful for searching in unsorted arrays?
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