AMAZON CODING INTERVIEW QUESTION - UNIQUE PATHS (LeetCode)

This is one of Amazon's most commonly asked interview questions according to LeetCode! Give me 5 minutes and you'll thank me if you see this in your Amazon coding interview!

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This question is commonly asked by the following companies: Amazon, Facebook, and Google.

Link to problem: https://leetcode.com/problems/k-close...

Intuition behind solution: Make a dp matrix to store unique paths to get to each cell. Fill the 0th column with ones and the 0th row with ones because there is only one way to get to each of those cells i.e. by moving straight down from the start and moving right from the start respectively. Then populate the rest of the dp matrix using the fact that for any cell you arrive at you had to have come from the cell above or the cell to the left of you (this is because we are only allowed to move right or down). Once you have finished populating the matrix return the bottom left corner of the dp matrix which represents the number of unique paths to reach the "finish".
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Видео AMAZON CODING INTERVIEW QUESTION - UNIQUE PATHS (LeetCode) канала Kevin Naughton Jr.