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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.

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Statement

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

A 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= ...