CodingHardcod-g850

Subject MatrixLevel Senior–Staff~45 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

Given an m x n integer matrix and an integer k, find the maximum sum of a rectangular submatrix such that the sum is no larger than k. It is guaranteed that at least one such submatrix exists. Return that maximum sum (which may be negative).

Implement

max_sum_submatrix(matrix: list[list[int]], k: int) → int

Examples

in[[[1,0,1],[0,-2,3]],2]out2

What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

Learn the concepts

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.