3Sum is one of the most popular questions in coding interviews. What’s more, it has several variations that seem to be more complicated, but in essence are same as the basic form.

We haven’t covered many topics about numbers in the past. Since 3sum questions have been asked by Google and Facebook recently, it’s a great time for us to analyze this topic in detail now.

The post is written by Gainlo - a platform that allows you to have mock interviews with employees from Google, Amazon etc..

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