Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

...Wait for it...

data structures, dsu, trees

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Information Reform

dp, implementation, trees

Similar Words

dp, hashing, strings, trees

Rowena Ravenclaw's Diadem

trees

Distance to the Path

data structures, dfs and similar, trees

Big Problems for Organizers

data structures, graphs, trees

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees

Double Tree

data structures, divide and conquer, shortest paths, trees

Garden

bitmasks, dp, graphs, trees

Matches Are Not a Child's Play

data structures, trees

Game On Tree

data structures, dfs and similar, greedy, trees

AB Tree

dp, greedy, trees

Policeman and a Tree

dp, graphs, trees

The Majestic Brown Tree Snake

dfs and similar, dp, greedy, trees, two pointers

Tree and XOR

strings, trees

Gastronomic Event

dp, greedy, trees

Broken Tree

dfs and similar, dp, graphs, greedy, trees

Reunion

combinatorics, dp, trees

Gasoline prices

data structures, divide and conquer, dsu, hashing, trees

Electrical Efficiency

combinatorics, data structures, dp, math, number theory, trees

In a Trap

trees

Noble Knight's Path

data structures, trees

Pilgrims

dfs and similar, dp, trees

Cycles in product

combinatorics, divide and conquer, trees

Exam

data structures, string suffix structures, trees

Random Forest Rank

dp, graph matchings, math, trees

Arkady and a Nobody-men

data structures, dfs and similar, trees

Edge Queries

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

One Node is Gone

constructive algorithms, implementation, trees

Magic Tree

*special problem, data structures, dp, trees

Around the World

bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees

Sherlock's bet to Moriarty

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Speed Dial

dp, strings, trees

Recover the Tree

constructive algorithms, trees

Shifting Dominoes

data structures, geometry, graphs, trees

Nikita and game

binary search, dfs and similar, divide and conquer, graphs, trees

Colorful Tree Again

brute force, data structures, trees

Squid Game

data structures, dfs and similar, greedy, trees

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Bear and Chemistry

data structures, dfs and similar, graphs, trees

Inverse Genealogy

constructive algorithms, divide and conquer, dp, math, trees

Uniformly Branched Trees

combinatorics, dp, trees

Andrey's Tree

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

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Andrew and Chemistry

dp, hashing, trees

Directing Edges

dfs and similar, dp, graphs, trees

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Tavas on the Path

data structures, divide and conquer, trees

Tiles Placement

constructive algorithms, dfs and similar, trees

Leaders

dfs and similar, dsu, graphs, trees

Legendary Tree

binary search, interactive, trees

Masha and Cactus

dp, trees

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

Bus Routes

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

Spring cleaning

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

Journey

dp, trees

Snowy Mountain

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

May Holidays

data structures, trees

Upgrading Tree

constructive algorithms, dfs and similar, graphs, math, trees

Heaps

dp, trees

Tree nesting

combinatorics, graphs, trees

Berland Miners

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

Parmigiana With Seafood

binary search, dp, greedy, trees

Anagram Paths

dp, implementation, trees

Li Hua and Path

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

Tree Calendar

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

Raining season

data structures, divide and conquer, trees

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Pairs

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

Find String in a Grid

data structures, dp, strings, trees

Distance Matching

constructive algorithms, dfs and similar, trees

Last chance

data structures, flows, graph matchings, graphs, trees

Berland SU Computer Network

constructive algorithms, dfs and similar, graphs, hashing, trees

Omkar and Tours

data structures, divide and conquer, sortings, trees

New Year and Social Network

data structures, graph matchings, graphs, math, trees

Tree or not Tree

data structures, divide and conquer, implementation, trees

Perfect Matching

data structures, divide and conquer, interactive, trees

Johnny and James

greedy, implementation, math, trees

Amanda the Amoeba

graphs, implementation, trees, two pointers

Beautiful Tree

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

Triameter

binary search, data structures, dfs and similar, trees

Eye-Pleasing City Park Tour

data structures, trees

Boring Card Game

data structures, greedy, trees

Alien DNA

data structures, dsu, trees

Madness

constructive algorithms, dfs and similar, trees

Frequency Mismatch (Easy Version)

binary search, data structures, divide and conquer, hashing, probabilities, trees

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

Squares

constructive algorithms, data structures, dp, graphs, trees

Sasha and Algorithm of Silence's Sounds

data structures, trees

Send the Fool Further! (hard)

dfs and similar, dp, math, trees

My Beautiful Madness

data structures, trees

Perpetual Motion Machine

constructive algorithms, dp, graphs, implementation, math, trees

Iron Man

data structures, geometry, trees

Train Tracks

data structures, trees

Send Tree to Charlie

combinatorics, dfs and similar, dsu, trees