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Lingua Romana
Vladislav and a Great Legend
Beautiful Regional Contest
Prefix Enlightenment
Civilization
Two-gram
Marvolo Gaunt's Ring
Numbers
Balanced bracket sequences
New Year Permutation
Oh Sweet Beaverette
Fast Fourier transform
Digits
Sieve of Eratosthenes
Vertical decomposition
Rock Is Push
K Paths
Solve RMQ (Range Minimum Query) by finding LCA (Lowest Common Ancestor)
Magic Odd Square
Double Elimination
Connected Components
Rectangle Painting 2
Dream Team
Yash And Trees
Purification
Koala and Notebook
Lowest Common Ancestor
Pick's Theorem - area of lattice polygons
Long Beautiful Integer
Grid Sort
Replicating Processes
Treap (Cartesian tree)
