Black and White Tree

dfs and similar, greedy, trees

Cats on the Upgrade (hard version)

binary search, data structures, dfs and similar, graphs, trees

Cats on the Upgrade (easy version)

brute force, data structures, dfs and similar, divide and conquer, dp, graphs, trees

Binary Spiders

bitmasks, data structures, implementation, math, sortings, trees

Middle Duplication

data structures, dfs and similar, greedy, strings, trees

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Christmas Chocolates

dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees

Purple Crayon

data structures, dfs and similar, games, graphs, greedy, math, sortings, trees

X(or)-mas Tree

bitmasks, dfs and similar, dsu, graphs, trees

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees

Escape The Maze (easy version)

dfs and similar, greedy, shortest paths, trees, two pointers

Weights Assignment For Tree Edges

constructive algorithms, trees

Mashtali vs AtCoder

games, trees

Squid Game

data structures, dfs and similar, greedy, trees

Social Network

dsu, graphs, greedy, implementation, trees

Alphabetic Tree

binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees

Tree Queries

brute force, dp, trees

Treelabeling

bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

Gardener and Tree

brute force, data structures, dfs and similar, greedy, implementation, trees

Hemose in ICPC ?

binary search, dfs and similar, implementation, interactive, math, number theory, trees

Bakry and Partitioning

bitmasks, constructive algorithms, dfs and similar, dp, graphs, trees

Poachers

dp, games, graphs, trees

Frequency Queries

data structures, dfs and similar, trees

Omkar and Tours

data structures, divide and conquer, sortings, trees

Moment of Bloom

constructive algorithms, dfs and similar, graph matchings, graphs, greedy, trees

Omkar and Heavenly Tree

constructive algorithms, trees

Subsequence

brute force, divide and conquer, dp, greedy, trees

Mathematics Curriculum

brute force, combinatorics, dp, trees

Illusions of the Desert

data structures, trees

Eye-Pleasing City Park Tour

data structures, trees

Buds Re-hanging

constructive algorithms, dfs and similar, dp, greedy, trees

Mocha and Diana (Hard Version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, trees, two pointers

Mocha and Diana (Easy Version)

brute force, constructive algorithms, dsu, graphs, greedy, trees

Good Graph

data structures, dsu, graphs, trees

Boring Segments

data structures, sortings, trees, two pointers

XOR and Distance

bitmasks, divide and conquer, trees

Equidistant Vertices

brute force, combinatorics, dfs and similar, dp, trees

How Many Paths?

dfs and similar, dp, graphs, trees

Tree Array

brute force, combinatorics, dp, graphs, math, probabilities, trees

Gold Transfer

binary search, data structures, dp, greedy, interactive, trees

Playoff Tournament

data structures, dfs and similar, dp, implementation, trees

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

Lost Tree

constructive algorithms, interactive, trees

Mashtali and Hagh Trees

combinatorics, dp, trees

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Parsa's Humongous Tree

dfs and similar, divide and conquer, dp, greedy, trees

MEX Tree

combinatorics, dfs and similar, implementation, math, trees

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Nastia Plays with a Tree

constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees

Off by One

constructive algorithms, dfs and similar, geometry, graphs, sortings, trees

Reunion

combinatorics, dp, trees

Phoenix and Earthquake

constructive algorithms, dfs and similar, dsu, graphs, greedy, trees

Yet Another Card Deck

brute force, data structures, implementation, trees

Tree Calendar

brute force, constructive algorithms, data structures, dfs and similar, sortings, trees

Complete the MST

bitmasks, brute force, data structures, dfs and similar, dsu, graphs, greedy, trees

Diameter Cuts

combinatorics, dfs and similar, dp, trees

Christmas Game

bitmasks, data structures, dfs and similar, dp, games, math, trees

Squares

constructive algorithms, data structures, dp, graphs, trees

BFS Trees

combinatorics, dfs and similar, graphs, math, shortest paths, trees

Dogeforces

constructive algorithms, data structures, dfs and similar, divide and conquer, dsu, greedy, sortings, trees

Yuezheng Ling and Dynamic Tree

data structures, trees

Fib-tree

brute force, dfs and similar, divide and conquer, number theory, trees

Pairs of Paths

combinatorics, data structures, dfs and similar, dp, trees

Move and Swap

dfs and similar, dp, greedy, trees

Exam

data structures, string suffix structures, trees

AB Tree

dp, greedy, trees

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Distinctive Roots in a Tree

data structures, dfs and similar, dp, trees

13th Labour of Heracles

data structures, greedy, sortings, trees

My Beautiful Madness

data structures, trees

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Range Diameter Sum

data structures, trees

Number of Simple Paths

combinatorics, dfs and similar, graphs, trees

Dog Snacks

binary search, dfs and similar, dp, greedy, trees

Game On Tree

data structures, dfs and similar, greedy, trees

Communism

bitmasks, dp, trees

Xor Tree

binary search, bitmasks, data structures, divide and conquer, dp, trees

Finding the Vertex

brute force, dfs and similar, dp, interactive, trees

Black, White and Grey Tree

binary search, constructive algorithms, dfs and similar, dp, greedy, trees

Cheat and Win

bitmasks, data structures, games, trees

Olha and Igor

interactive, probabilities, trees

Death DBMS

data structures, string suffix structures, strings, trees

Minimal Height Tree

graphs, greedy, shortest paths, trees

Bandit in a City

binary search, dfs and similar, graphs, greedy, trees

Boring Card Game

data structures, greedy, trees

Dušan's Railway

divide and conquer, graphs, trees

Graph and Queries

data structures, dsu, graphs, implementation, trees

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Roads and Ramen

data structures, trees

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Tree Tag

dfs and similar, dp, games, trees

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Weights Division (hard version)

binary search, dfs and similar, greedy, sortings, trees, two pointers

Weights Division (easy version)

data structures, dfs and similar, greedy, trees

Distance Matching

constructive algorithms, dfs and similar, trees