Kth Smallest Element in a Sorted Matrix
Given an n x n matrix where each of the rows and columns is sorted in ascending order, return the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element.

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Kth Smallest Element in a Sorted Matrix
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Given an n x n matrix where each of the rows and columns is sorted in ascending order, return the kth smallest element in the matrix. Note that it is the kth smallest element in the sorted order, not the kth distinct element.

Example 1:
Input: {"matrix":[[1,5,9],[10,11,13],[12,13,15]],"k":8}
Output: 13
Constraints:

  • n==matrix.length==matrix[i].lengthn == \text{matrix.length} == \text{matrix}[i].\text{length}

  • 1≤n≤3001 \leq n \leq 300

  • −109≤matrix[i][j]≤109-10^9 \leq \text{matrix}[i][j] \leq 10^9

  • All rows and columns are sorted in non-decreasing order.

  • 1≤k≤n21 \leq k \leq n^2

Input
arr ={"matrix":[[1,5,9],[10,11,13],[12,13,15]],"k":8}

Start BS range [1, 15]

1

5

9

10

11

13

12

13

15

Variables
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