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Solution: Shortest Path in a Grid with Obstacles Elimination

Understand how to use BFS to find the shortest path in a grid allowing for obstacle eliminations. Learn to represent states with remaining eliminations, efficiently track visited states, and handle movement in four directions. This lesson helps you solve grid problems that require obstacle removal within given constraints while optimizing search and managing complexity.

Statement

Given an m x n integer matrix grid, where each cell contains either 00 (empty) or 11 (obstacle), you may move one step at a time in any of the four directions (up, down, left, right), but only into empty cells.

Return the minimum number of steps required to travel from the upper-left corner ((0, 0) ...