leetcode-problemset/leetcode/originData/[no content]shortest-path-in-a-hidden-grid.json

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            "questionFrontendId": "1778",
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            "title": "Shortest Path in a Hidden Grid",
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                {
                    "name": "Depth-First Search",
                    "slug": "depth-first-search",
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                {
                    "name": "Breadth-First Search",
                    "slug": "breadth-first-search",
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                    "name": "Graph",
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            "hints": [
                "The grid is at a maximum 500 x 500, so it is clever to assume that the robot's initial cell is grid[501][501]",
                "Run a DFS from the robot's position to make sure that you can reach the target, otherwise you should return -1.",
                "Now that you are sure you can reach the target, run BFS to find the shortest path."
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