Subquadratic 3-sum

[monkyyy]

Theres very very little information on the ai work, its all 
ai-news slop except:

https://www.youtube.com/watch?v=aKh-ysnRqBM

Do you want 600 lean files and only ai slop writting? Boy do I 
have the repo for you: 
https://github.com/c0ldzy17/three-sum-lean/blob/2b639655e07421b9ac743de9090459bab473a7c0/METHOD.md

They earn those 3 stars.

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I believe the core idea is to create some sort of type that 
encodes a filter, so you can dip into the fast matrix multiply 
math

I dont understand the "exact triangle" problem and the 2xn matrix 
multiply that did the first breaking.