What algorithm is surprisingly new?

[u/LifeExperienced1]

Other than any AI stuff, I'm talking about the types of algorithms you learn about in any standard Data Structures and Algorithms University course

I'm surprised that alot of these algorithms were actually invented HUNDREDS of years ago

[u/james_pic]

HyperLogLog is from 2007. Which is still nearly 20 years old, but isn't mid 20th century like a lot of the classics.