Unique Paths in 2D grid | PROGRAMMING INTERVIEWS



Unique Paths in 2D grid | PROGRAMMING INTERVIEWS

Question: There is an m x n grid. One can only move either down or right at any point in time. One is trying to reach the bottom-right corner of the grid.

How many possible unique paths are there?
Below is an example of 4x4 grid. Here from moving top-left to bottom right corner, we will have 20 unique paths.

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