Unity 3D Interview Question Software Engineer / Developers
Country: United States
Interview Type: In-Person
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1) it's just the Manhattan distance, first move m-1 fields down, then n-1 left. Probably the original question had some fields in the matrix one couldn't touch. Then we would need some shortest path algorithm, simple to implement would be single source BFS, elegant and fast would be A*. In the middle is bi-source BFS (easier to implement, still quite stupid on a map)
- Chris November 04, 20172) There are infinite amount of paths, because there is no requirement that limits the path length or prohibits going in cycles, so, if there is one path, there are infinite many paths (you can cycle between any two fields as long as you want)
If you limit either the path length or set a constraint of not visiting a field twice, the problem has a DP solution.