# 1380. Lucky Numbers in a Matrix """ given an 'm 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 """ class Solution(object): def luckyNumbers(self, matrix): """ :type matrix: List[List[int]] :rtype: List[int] """ return list({min(row) for row in matrix} & {max(col) for col in zip(*matrix)}) if __name__ == "__main__": obj = Solution() print(obj.luckyNumbers(matrix=[[3, 7, 8], [9, 11, 13], [15, 16, 17]])) print(obj.luckyNumbers(matrix=[[1, 10, 4, 2], [9, 3, 8, 7], [15, 16, 17, 12]])) print(obj.luckyNumbers(matrix=[[7, 8], [1, 2]]))