Leetcode 505. The Maze II

Given a grid maze where a ball, when moved in any direction, keeps rolling until it hits a wall (it cannot stop mid-roll), compute the minimum number of steps needed to reach a destination cell (or -1 if unreachable). This is a shortest-path problem on a graph with edge costs equal to roll distances, typically solved with Dijkstra (or BFS with a priority queue) while tracking minimum distances to each cell.