Question
You are given an m x n grid where each cell is 0 (open) or 1 (wall). Starting at the top-left (0,0) and moving 4-directionally to the bottom-right (m-1,n-1), you may remove at most k walls along your path. Return the minimum number of steps to reach the bottom-right, or -1 if it cannot be reached even after removing up to k walls. You cannot leave the grid. If the start cell is a wall it counts against your budget too.
min_steps_with_removals(grid: list[list[int]], k: int) → int[[[0,1,0],[0,1,0],[0,0,0]],1]out4State 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.
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.