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Solution: Lucky Numbers in a Matrix

Explore how to find a lucky number in a matrix, defined as an element smallest in its row and largest in its column. Learn to apply a greedy algorithm to systematically identify such a number or determine its absence. Understand the time and space complexity to optimize your solution efficiently.

Statement

Given an m×nm \times n matrix of distinct numbers, return the lucky number in the matrix.

lucky number is an element of the matrix such that it is the smallest element in its row and largest in its column.

Constraints:

  • m= ...