Package g1701_1800.s1738_find_kth_largest_xor_coordinate_value

Class Solution

java.lang.Object
g1701_1800.s1738_find_kth_largest_xor_coordinate_value.Solution
public class Solution extends Object
1738 - Find Kth Largest XOR Coordinate Value.

Medium

You are given a 2D matrix of size m x n, consisting of non-negative integers. You are also given an integer k.

The value of coordinate (a, b) of the matrix is the XOR of all matrix[i][j] where 0 <= i <= a < m and 0 <= j <= b < n (0-indexed).

Find the kth largest value (1-indexed) of all the coordinates of matrix.

Example 1:

Input: matrix = [[5,2],[1,6]], k = 1

Output: 7

Explanation: The value of coordinate (0,1) is 5 XOR 2 = 7, which is the largest value.

Example 2:

Input: matrix = [[5,2],[1,6]], k = 2

Output: 5

Explanation: The value of coordinate (0,0) is 5 = 5, which is the 2nd largest value.

Example 3:

Input: matrix = [[5,2],[1,6]], k = 3

Output: 4

Explanation: The value of coordinate (1,0) is 5 XOR 1 = 4, which is the 3rd largest value.

Constraints:

  • m == matrix.length
  • n == matrix[i].length
  • 1 <= m, n <= 1000
  • 0 <= matrix[i][j] <= 106
  • 1 <= k <= m * n

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • kthLargestValue

      public int kthLargestValue(int[][] matrix, int k)