Currently into Competitive Programming, Machine Learning, and building stuff. Open to collaborating on any projects or ideas.
Flatten a tree with an Euler tour so every subtree becomes a contiguous range. Then turn subtree queries into array ranges solvable with a Fenwick Tree or lazy Segment Tree, edge mapping tricks, pitfalls, and templates.
Explore how mathematics plays a crucial role in competitive programming and the resources to master it.
Solutions and explanations for Codeforces Round 1037 (Div. 3).
Solutions and explanations for Codeforces Round 1035 (Div. 2).
Solutions and explanations for Codeforces Round 1034 (Div. 3).