public class Solution
extends Object
1380 - Lucky Numbers in a Matrix\.
Easy
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:**
**Input:** matrix = \[\[3,7,8],[9,11,13],[15,16,17]]
**Output:** [15]
**Explanation:** 15 is the only lucky number since it is the minimum in its row and the maximum in its column.
**Example 2:**
**Input:** matrix = \[\[1,10,4,2],[9,3,8,7],[15,16,17,12]]
**Output:** [12]
**Explanation:** 12 is the only lucky number since it is the minimum in its row and the maximum in its column.
**Example 3:**
**Input:** matrix = \[\[7,8],[1,2]]
**Output:** [7]
**Explanation:** 7 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] <= 105.
* All elements in the matrix are distinct.