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 Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	kthLargestValue(int[][] matrix, int k)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

kthLargestValue

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