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All topics›JavaScript›DP: 2D

Unique Paths

beginnerlayer I8 · DP: 2D5 tests

A robot starts in the top-left cell of an m x n grid and wants to reach the bottom-right cell. It may only move right or down. Return how many distinct paths there are.

  • uniquePaths(3, 7) is 28
  • A single row or a single column has exactly 1 path
  • m is the number of rows and n the number of columns

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