Burenka and Pether

*special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees

Algoland and Berland

constructive algorithms, divide and conquer, geometry

Egg Roulette

bitmasks, brute force, divide and conquer, math, meet-in-the-middle

Three Minimums

combinatorics, constructive algorithms, divide and conquer, dp, fft, math

Cyclic Hamming (Easy Version)

brute force, divide and conquer, dp, fft, math, number theory

Yet Yet Another Permutation Problem

divide and conquer, fft, math

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

Tenzing and Necklace

divide and conquer, dp, greedy

Strange Covering

divide and conquer

Verifying Kingdom

binary search, divide and conquer, interactive, trees

Dušan's Railway

divide and conquer, graphs, trees

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Balance the Cards

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

Treasure Hunt

data structures, divide and conquer, two pointers

Koxia and Bracket

divide and conquer, fft, math

Alesya and Discrete Math

divide and conquer, interactive

Tree LGM

constructive algorithms, divide and conquer, games, trees

Iqea

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

Test Data Generation

combinatorics, divide and conquer, dp, fft, math, number theory

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Stairs

combinatorics, divide and conquer, dp, fft, math

Journey

data structures, divide and conquer, graphs, trees

Days of Floral Colours

combinatorics, divide and conquer, dp, fft, math

Special Positions

combinatorics, divide and conquer, fft, math

Speckled Band

data structures, divide and conquer, hashing, string suffix structures, strings

Hard Cut

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

Half-sum

brute force, divide and conquer, greedy

Furukawa Nagisa's Tree

binary search, divide and conquer, sortings, trees

Deck-Building Game

divide and conquer, math

Blue and Red of Our Faculty!

divide and conquer, dp

Doe Graphs

constructive algorithms, divide and conquer, dp, graphs, shortest paths

Perfect Matching

data structures, divide and conquer, interactive, trees

Reindeer Games

binary search, constructive algorithms, data structures, divide and conquer, flows, graphs, shortest paths

Tree or not Tree

data structures, divide and conquer, implementation, trees

Formurosa

divide and conquer, dp, expression parsing

Omkar and Tours

data structures, divide and conquer, sortings, trees

Xor Spanning Tree

divide and conquer, fft, graphs

Raining season

data structures, divide and conquer, trees

Li Hua and Path

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

Not Quick Transformation

divide and conquer, math

Frequency Mismatch (Easy Version)

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

Gregor and the Two Painters

data structures, divide and conquer, graphs, greedy, math

SmartGarden

constructive algorithms, divide and conquer

Finding lines

constructive algorithms, divide and conquer, interactive

Product Tuples

divide and conquer, fft

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Dish Shopping

data structures, divide and conquer

Teleportation in Byteland

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

Xor-Set

bitmasks, divide and conquer, math

Tavas on the Path

data structures, divide and conquer, trees

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Graph Coloring (hard version)

brute force, combinatorics, divide and conquer, dp, fft, graphs

Random Elections

bitmasks, brute force, divide and conquer, fft, math

Air Reform

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

Inverse Genealogy

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

The Final Pursuit

bitmasks, constructive algorithms, divide and conquer, graphs, greedy, math

Set Merging

constructive algorithms, divide and conquer

Nikita and game

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

Try Booking

data structures, divide and conquer

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Sherlock's bet to Moriarty

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

Omkar and Modes

binary search, divide and conquer, interactive

Cycles in product

combinatorics, divide and conquer, trees

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Gasoline prices

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

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

Half-decay tree

data structures, divide and conquer, dp, math, probabilities

Bear and Cavalry

data structures, divide and conquer, dp

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Field Should Not Be Empty

brute force, data structures, divide and conquer

Double Tree

data structures, divide and conquer, shortest paths, trees

Communication Towers

brute force, divide and conquer, dsu

Chess Strikes Back (hard version)

data structures, divide and conquer

Timofey and our friends animals

data structures, divide and conquer, dsu

Candies and Stones

divide and conquer, dp

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Invertation in Tournament

brute force, divide and conquer, graphs, math

Fox And Polygon

constructive algorithms, divide and conquer

Travelling Through the Snow Queen's Kingdom

bitmasks, brute force, divide and conquer, graphs

Raging Thunder

data structures, divide and conquer, implementation

Julia the snail

data structures, divide and conquer, dp

Virus

data structures, divide and conquer, dsu, graphs

Parking Lot

data structures, divide and conquer

Empty Rectangles

divide and conquer, two pointers

Forced Online Queries Problem

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

Vus the Cossack and a Field

divide and conquer, implementation, math

Divisor Set

divide and conquer, fft, greedy, math, number theory

Battalion Strength

data structures, divide and conquer, probabilities

Artistic Partition

divide and conquer, dp, number theory

Maximums and Minimums

combinatorics, data structures, divide and conquer, number theory

Number Clicker

divide and conquer, graphs, meet-in-the-middle, number theory

Jumping Around

binary search, data structures, divide and conquer, dp, dsu, graphs, shortest paths

Lenient Vertex Cover

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

Abracadabra

divide and conquer

Minibuses on Venus (medium version)

combinatorics, divide and conquer, dp, matrices

Jellyfish and Miku

divide and conquer, dp, math, probabilities

XOR Partition

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

Maze 2D

data structures, divide and conquer

Tree Coloring

combinatorics, divide and conquer, fft

XOR and Distance

bitmasks, divide and conquer, trees