AMAZON CODING INTERVIEW QUESTION - COMBINATION SUM II (LeetCode)

This is one of Amazon's most commonly asked interview questions according to LeetCode (2019)! Combination Sum II coding solution. If you give me 10 minutes you'll thank me if this appears during your Amazon interview! Coding Interviews Combination Sum II (LeetCode) question and explanation.

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This question is commonly asked by the following companies: Amazon, Microsoft, and Uber.

Link to problem: https://leetcode.com/problems/combination-sum-ii/

Intuition behind solution: Sort our numbers and call a recursive function to generate all unique combinations. In each recursive call, check if our target is 0, if it is, add the combination to our return value, if our target is less than 0 return, otherwise, simulate taking and not taking the remaining of elements in candidates by iterating through the rest of the numbers, adding the current number to our current list and calling our function recursively with the new target (target - candidates[i]) and then remove the last number we added (to simulate not taking the current number). Once the top level call returns, return our result.
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Видео AMAZON CODING INTERVIEW QUESTION - COMBINATION SUM II (LeetCode) канала Kevin Naughton Jr.