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Solution: Lucky Numbers in a Matrix

Explore how to determine lucky numbers in a matrix, defined as values that are the smallest in their row and largest in their column. This lesson guides you through implementing a greedy algorithm with O(m × n) time complexity and minimal space usage, helping you solve this unique problem using clear, step-by-step logic.

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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=m = matrix.length

  • n=n = ...