Kefa and Park

dfs and similar, graphs, trees

Party

dfs and similar, graphs, trees

Sum in Binary Tree

bitmasks, combinatorics, math, trees

k-Tree

dp, implementation, trees

Xenia and Bit Operations

data structures, trees

Yet Another Card Deck

brute force, data structures, implementation, trees

Linova and Kingdom

dfs and similar, dp, greedy, sortings, trees

Game On Leaves

games, trees

Strong Vertices

math, sortings, trees

Apple Tree

combinatorics, dfs and similar, dp, math, trees

Mahmoud and Ehab and the bipartiteness

dfs and similar, graphs, trees

Journey

dfs and similar, dp, graphs, probabilities, trees

Reposts

*special problem, dfs and similar, dp, graphs, trees

Christmas Spruce

implementation, trees

Begginer's Zelda

greedy, trees

Masha and a Beautiful Tree

dfs and similar, divide and conquer, graphs, sortings, trees

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees

Not Assigning

constructive algorithms, dfs and similar, number theory, trees

Parsa's Humongous Tree

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

Valid BFS?

dfs and similar, graphs, shortest paths, trees

Distance in Tree

dfs and similar, dp, trees

Mocha and Diana (Easy Version)

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

Ehab and Path-etic MEXs

constructive algorithms, dfs and similar, greedy, trees

Lomsat gelral

data structures, dfs and similar, dsu, trees

Vertical Paths

graphs, implementation, trees

Copil Copac Draws Trees

dfs and similar, dp, graphs, trees

Minimal Height Tree

graphs, greedy, shortest paths, trees

Edgy Trees

dfs and similar, dsu, graphs, math, trees

Omkar and Heavenly Tree

constructive algorithms, trees

Gardener and Tree

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

PolandBall and Forest

dfs and similar, dsu, graphs, interactive, trees

Queen

dfs and similar, trees

Cut 'em all!

dfs and similar, dp, graphs, greedy, trees

13th Labour of Heracles

data structures, greedy, sortings, trees

Infected Tree

dfs and similar, dp, trees

Anji's Binary Tree

dfs and similar, dp, trees

Cover it!

dfs and similar, dsu, graphs, shortest paths, trees

Roads not only in Berland

dsu, graphs, trees

Who Tested?

*special problem, expression parsing, trees

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Timofey and a tree

dfs and similar, dp, dsu, graphs, implementation, trees

Enemy is weak

data structures, trees

Xor-tree

dfs and similar, trees

Link Cut Centroids

constructive algorithms, dfs and similar, graphs, trees

Weights Assignment For Tree Edges

constructive algorithms, trees

Queries for the Array

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

Valera and Elections

dfs and similar, graphs, trees

Military Problem

dfs and similar, graphs, trees

Uncle Bogdan and Country Happiness

dfs and similar, greedy, math, trees

Vasiliy's Multiset

binary search, bitmasks, data structures, trees

Tree Cutting

binary search, dp, greedy, implementation, trees

Maximum White Subtree

dfs and similar, dp, graphs, trees

Maximum Distributed Tree

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

Tree Queries

dfs and similar, graphs, trees

Andryusha and Colored Balloons

dfs and similar, graphs, greedy, trees

Choosing Capital for Treeland

dfs and similar, dp, graphs, trees

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Sum in the tree

constructive algorithms, dfs and similar, greedy, trees

TediousLee

dp, graphs, greedy, math, trees

Add on a Tree

trees

Edge Weight Assignment

bitmasks, constructive algorithms, dfs and similar, greedy, math, trees

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Tree Infection

binary search, greedy, sortings, trees

0, 1, 2, Tree!

bitmasks, brute force, greedy, implementation, trees

Xenia and Tree

data structures, divide and conquer, trees

Bakry and Partitioning

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

Tree Painting

dfs and similar, dp, trees

Playoff Tournament

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

Dr. Evil Underscores

bitmasks, brute force, dfs and similar, divide and conquer, dp, greedy, strings, trees

Tree with Maximum Cost

dfs and similar, dp, trees

Paint the Tree

brute force, constructive algorithms, dp, graphs, implementation, trees

Path Prefixes

binary search, data structures, dfs and similar, trees

Tree Tag

dfs and similar, dp, games, trees

Alyona and the Tree

dfs and similar, dp, graphs, trees

Social Network

dsu, graphs, greedy, implementation, trees

Minimum spanning tree for each edge

data structures, dfs and similar, dsu, graphs, trees

Escape The Maze (easy version)

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

Shichikuji and Power Grid

dsu, graphs, greedy, shortest paths, trees

Ciel the Commander

constructive algorithms, dfs and similar, divide and conquer, greedy, trees

Peculiar apple-tree

dfs and similar, graphs, trees

Fools and Roads

data structures, dfs and similar, trees

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Okabe and Boxes

data structures, greedy, trees

Mad City

dfs and similar, dsu, games, graphs, shortest paths, trees

Tree Shuffling

dfs and similar, dp, greedy, trees

Bear and Forgotten Tree 3

constructive algorithms, graphs, trees

Eternal Victory

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

Tree and Queries

data structures, dfs and similar, trees

A and B and Lecture Rooms

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

Interesting Array

constructive algorithms, data structures, trees

Captain Flint and Treasure

data structures, dfs and similar, graphs, greedy, implementation, trees

Blood Cousins

binary search, data structures, dfs and similar, trees

Propagating tree

data structures, dfs and similar, trees

Kuro and Walking Route

dfs and similar, trees

A Wide, Wide Graph

dfs and similar, dp, graphs, greedy, trees

Minimum Maximum Distance

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

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Bandit in a City

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