🧠 Before you code — what pattern fits?
A robot starts at the top-left of an m x n grid and can only move right or down. Return the number of unique paths to reach the bottom-right corner.
(3,7) → 28
(3,2) → 3
🎬 Video explanation · NeetCode
Your solution runs against 3 unit tests, including edge and large-value cases.
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Test console · 3 unit tests
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