Matching Names

dfs and similar, strings, trees

Shaass the Great

dp, trees

Guess the Tree

bitmasks, constructive algorithms, dp, greedy, trees

Bear and Drawing

constructive algorithms, dfs and similar, trees

Famil Door and Roads

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

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Sagheer and Apple Tree

games, trees

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Rubik's Cube Coloring (hard version)

brute force, dp, implementation, math, trees

Omsk Metro (hard version)

data structures, dfs and similar, divide and conquer, dp, math, trees

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

There Should Be a Lot of Maximums

brute force, data structures, dfs and similar, dp, trees, two pointers

Unique Occurrences

data structures, dfs and similar, divide and conquer, dp, dsu, trees

Scheme

dfs and similar, graphs, trees

PermutationForces II

brute force, combinatorics, greedy, sortings, trees, two pointers

Sasha and the Wedding Binary Search Tree

brute force, combinatorics, data structures, dfs and similar, math, trees

Subtree Minimum Query

data structures, trees

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

Yet Another Array Counting Problem

binary search, data structures, divide and conquer, dp, flows, math, trees

Company

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

Tree Compass

constructive algorithms, dfs and similar, greedy, trees

Alternating Tree

combinatorics, dfs and similar, divide and conquer, dp, probabilities, trees

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Merging Towers

data structures, dsu, implementation, trees

Tree Queries (Hard Version)

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

Pursuit For Artifacts

dfs and similar, dsu, graphs, trees

Binary Spiders

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

Dog Snacks

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

Happy Life in University

data structures, dfs and similar, greedy, trees

Hemose in ICPC ?

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

Removing Leaves

data structures, greedy, implementation, trees

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

MEX Queries

binary search, data structures, trees

LuoTianyi and the Floating Islands (Hard Version)

combinatorics, dfs and similar, math, probabilities, trees

Tree Array

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

Dogeforces

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

Trees of Tranquillity

data structures, dfs and similar, greedy, trees

Road Improvement

dp, trees

Centroids

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

Dominant Indices

data structures, dsu, trees

Lomsat gelral

data structures, dfs and similar, dsu, trees

Help King

implementation, probabilities, trees

Leaders

dfs and similar, dsu, graphs, trees

Jamie and To-do List

data structures, interactive, trees

Petya and Tree

binary search, dfs and similar, probabilities, sortings, trees

Maximum Control (medium)

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

Berland Federalization

dp, trees

Interstellar battle

math, probabilities, trees

Ksenia and Pawns

dfs and similar, graphs, implementation, trees

BinCoin

binary search, divide and conquer, hashing, implementation, probabilities, trees

Paint Tree

constructive algorithms, divide and conquer, geometry, sortings, trees

Thwarting Demonstrations

binary search, data structures, trees

Brain Network (hard)

trees

Divisor Tree

brute force, number theory, trees

Bribes

dfs and similar, graphs, trees

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Ralph And His Tour in Binary Country

brute force, data structures, trees

Hill Climbing

dfs and similar, geometry, trees

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Short Code

data structures, dp, greedy, strings, trees

Compressed Tree

dfs and similar, dp, graphs, greedy, sortings, trees

Gift

dsu, graphs, sortings, trees

Demiurges Play Again

dfs and similar, dp, math, trees

Treeland Tour

data structures, dfs and similar, dp, trees

DIY Garland

constructive algorithms, greedy, trees

Tree

binary search, dp, trees

Hemose on the Tree

bitmasks, constructive algorithms, dfs and similar, trees

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Edge Reverse

binary search, dfs and similar, graphs, trees

The Maximum Subtree

dfs and similar, dp, graphs, trees

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

Tests for problem D

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

Equidistant Vertices

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

The Number Games

data structures, greedy, trees

Prefix Function Queries

dfs and similar, dp, hashing, string suffix structures, strings, trees

X(or)-mas Tree

bitmasks, dfs and similar, dsu, graphs, trees

Symmetree

dfs and similar, hashing, implementation, trees

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Ants in Leaves

dfs and similar, greedy, sortings, trees

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Tree Queries (Easy Version)

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

Maximum Weight Subset

dp, trees

Playoff Fixing

combinatorics, trees

Construct the Binary Tree

brute force, constructive algorithms, trees

Moment of Bloom

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

Weights Division (hard version)

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

Super M

dfs and similar, dp, graphs, trees

Tourism

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

Gold Transfer

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

Tree Master

brute force, data structures, dfs and similar, trees

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Equal Tree Sums

constructive algorithms, dfs and similar, math, trees

Sausage Maximization

bitmasks, data structures, trees

Game on Tree

implementation, math, probabilities, trees

0-1-Tree

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

Duff in the Army

data structures, trees

Tree Requests

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

Send the Fool Further! (medium)

dp, trees

Diverging Directions

data structures, dfs and similar, trees