Lucky Numbers in a Matrix
Given an m x n matrix of distinct numbers, return all lucky numbers in the matrix in any order.
A lucky number is an element of the matrix such that it is the minimum element in its row and maximum in its column.
Example 1
3 7 8 9 11 13 15 16 17
Input
matrix = [[3,7,8],[9,11,13],[15,16,17]]Output
[15]15 is the only lucky number since it is the minimum in its row and the maximum in its column.
Example 2
1 10 4 2 9 3 8 7 15 16 17 12
Input
matrix = [[1,10,4,2],[9,3,8,7],[15,16,17,12]]Output
[12]12 is the only lucky number since it is the minimum in its row and the maximum in its column.
Constraints
- m == mat.length
- n == mat[i].length
- 1 <= n, m <= 50
- 1 <= matrix[i][j] <= 10^5.
- All elements in the matrix are distinct.