Virus

data structures, divide and conquer, dsu, graphs

Field Should Not Be Empty

brute force, data structures, divide and conquer

Fox And Polygon

constructive algorithms, divide and conquer

Xor Spanning Tree

divide and conquer, fft, graphs

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Invertation in Tournament

brute force, divide and conquer, graphs, math

Timofey and our friends animals

data structures, divide and conquer, dsu

Candies and Stones

divide and conquer, dp

Chess Strikes Back (hard version)

data structures, divide and conquer

Double Tree

data structures, divide and conquer, shortest paths, trees

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Joker

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

Bear and Cavalry

data structures, divide and conquer, dp

Half-decay tree

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

Yet Another Partiton Problem

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

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Try Booking

data structures, divide and conquer

Gasoline prices

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

Omkar and Modes

binary search, divide and conquer, interactive

Cycles in product

combinatorics, divide and conquer, trees

Sherlock's bet to Moriarty

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

Inverse Genealogy

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

Frequency Mismatch (Easy Version)

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

Set Merging

constructive algorithms, divide and conquer

Nikita and game

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

Dish Shopping

data structures, divide and conquer

The Final Pursuit

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

Gregor and the Two Painters

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

Air Reform

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

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Teleportation in Byteland

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

Random Elections

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

Tavas on the Path

data structures, divide and conquer, trees

Graph Coloring (hard version)

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

Xor-Set

bitmasks, divide and conquer, math

Oleg and chess

data structures, divide and conquer, flows, graph matchings

Product Tuples

divide and conquer, fft

Finding lines

constructive algorithms, divide and conquer, interactive

SmartGarden

constructive algorithms, divide and conquer

Li Hua and Path

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

Raining season

data structures, divide and conquer, trees

Not Quick Transformation

divide and conquer, math

Formurosa

divide and conquer, dp, expression parsing

Reindeer Games

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

Simultaneous Coloring

dfs and similar, divide and conquer, graphs

Omkar and Tours

data structures, divide and conquer, sortings, trees

Tree or not Tree

data structures, divide and conquer, implementation, trees

Perfect Matching

data structures, divide and conquer, interactive, trees

Doe Graphs

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

Blue and Red of Our Faculty!

divide and conquer, dp

Deck-Building Game

divide and conquer, math

Furukawa Nagisa's Tree

binary search, divide and conquer, sortings, trees

Half-sum

brute force, divide and conquer, greedy

Hard Cut

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

Speckled Band

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

Special Positions

combinatorics, divide and conquer, fft, math

Journey

data structures, divide and conquer, graphs, trees

Days of Floral Colours

combinatorics, divide and conquer, dp, fft, math

Spinning Round (Easy Version)

divide and conquer, dp, trees

Stairs

combinatorics, divide and conquer, dp, fft, math

Wizards and Roads

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

Test Data Generation

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

Iqea

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

Tree LGM

constructive algorithms, divide and conquer, games, trees

Alesya and Discrete Math

divide and conquer, interactive

Koxia and Bracket

divide and conquer, fft, math

Treasure Hunt

data structures, divide and conquer, two pointers

Polygonal Segments

brute force, data structures, divide and conquer, dp, greedy, two pointers

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Dušan's Railway

divide and conquer, graphs, trees

Balance the Cards

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

Verifying Kingdom

binary search, divide and conquer, interactive, trees

Strange Covering

divide and conquer

Tenzing and Necklace

divide and conquer, dp, greedy

Arranging Crystal Balls

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

Yet Yet Another Permutation Problem

divide and conquer, fft, math

Cyclic Hamming (Easy Version)

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

Spinning Round (Hard Version)

divide and conquer, dp, trees

Three Minimums

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

Egg Roulette

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

Algoland and Berland

constructive algorithms, divide and conquer, geometry

Burenka and Pether

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