You knew this was coming,
Personally, I don’t like this question. Unless you know the question, it can be very hard to come up with a solution on the flow. Unlike the harder problems that I’ve covered here, some of the decisions you have to make rely on prior experience (or insane luck). That being said, this is a question that you have to know. It is very common, and some of the tricks used here are very useful. So there I would be remiss in not covering it.
Problem
Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]]
such that i != j
, i != k
, and j != k
, and nums[i] + nums[j] + nums[k] == 0
.
Notice that the solution set must not contain duplicate triplets.
Example 1:
Input: nums = [-1,0,1,2,-1,-4]
Output: [[-1,-1,2],[-1,0,1]]
Example 2:
Input: nums = []
Output: []
Example 3:
Input: nums = [0]
Output: []
You can test your solution here
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Happy Prep. I’ll see you at your dream job.
Keep up your questions,
Devansh <3
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