My name is Vitaly Aksenov and I present you the new lesson in English EDU section as a part of "ITMO Academy: pilot course". I will talk about Disjoint Sets Union (DSU).
A little bit about myself, I cannot brag about being red (International Grandmaster), however, I was twice and each time afterwards there was a revolution of colours on Codeforces. :-) Right now I am the Researcher in ITMO University in parallel and distributed computing (link). Also, I am in Jury Committee of several olympiads such as NERC, Bioinformatics Contest, Russian Code Cup and etc.
This is my first time to write a lecture so do not judge harshly. I hope you will like it!
More about EDU section you can read in this post.