Ruler Of The Zoo

brute force, data structures

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

AquaMoon and Potatoes

brute force, data structures, dp

Mark and Spaceship

brute force, dp

Clubstep

binary search, brute force, data structures, greedy, trees

Optimal Encoding

brute force, data structures

Olympic Team Building

brute force, meet-in-the-middle

Finding the Vertex

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

Blocks and Sensors

brute force

Maximum Product?

brute force, combinatorics, dp, greedy, implementation, math, two pointers

Minecraft Series

brute force, two pointers

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Chiori and Doll Picking (hard version)

bitmasks, brute force, combinatorics, math

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Cyclic Hamming (Easy Version)

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

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Half-sum

brute force, divide and conquer, greedy

Egg Roulette

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

Hex Dyslexia

bitmasks, brute force, dp, graphs

The Films

brute force

Gregor and the Odd Cows (Hard)

brute force, geometry, math, number theory

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

N Machines

binary search, brute force, greedy

Nastya and CBS

brute force, data structures, hashing

Math, math everywhere

brute force, dp, math, meet-in-the-middle, number theory

Marek and Matching (hard version)

brute force, probabilities

Two Posters

brute force, data structures, greedy, two pointers

Inverse Inversions

binary search, brute force, data structures

Segment Covering

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

Chests and Keys

bitmasks, brute force, dfs and similar, dp, flows

Qingshan and Daniel

brute force, data structures, greedy, implementation

New Year and Binary Tree Paths

bitmasks, brute force, combinatorics, dp

Invertation in Tournament

brute force, divide and conquer, graphs, math

Show Must Go On

binary search, brute force, greedy, shortest paths

To Hack or not to Hack

brute force, dp, greedy

Low Budget Inception

brute force, geometry

Marek and Matching (easy version)

brute force, probabilities

Just Kingdom

brute force, data structures, dfs and similar

Minimum Diameter

binary search, brute force

Harry The Potter

brute force, constructive algorithms, dp, fft, implementation, math

Infinite Game

brute force, combinatorics, dp, games, probabilities

Tree Calendar

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

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Mrs. Hudson's Pancakes

brute force, dp

Weird LCM Operations

brute force, constructive algorithms, number theory

Sequence Transformation

brute force, data structures, dp, implementation, math

Palindromic Hamiltonian Path

brute force, dfs and similar, dp, graphs, hashing

A Story of One Country (Hard)

brute force, greedy, sortings

Chain Reaction

brute force, geometry

Banners

brute force, data structures, dp

Tower Defense

binary search, brute force, data structures

Game Bundles

brute force, constructive algorithms, dp, greedy, math

Colorful Tree Again

brute force, data structures, trees

String Distance

binary search, brute force, data structures, hashing, implementation, strings

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

Game of Stacks

brute force, dfs and similar, graphs, implementation, trees

Abandoning Roads

brute force, dp, graphs, greedy

Make It Ascending

bitmasks, brute force, dp

Substrings in a String

bitmasks, brute force, data structures, string suffix structures, strings

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Plane of Tanks

brute force, geometry

Pills

brute force, flows

Hellish Constraints

brute force, dp, two pointers

Strange Triples

brute force, math, number theory

Wavy numbers

brute force, dfs and similar, meet-in-the-middle, sortings

Gears

brute force, geometry, math

Take Metro

brute force, data structures, graphs

Bitonix' Patrol

bitmasks, brute force, combinatorics, dfs and similar, math

A Creative Cutout

brute force, combinatorics, math

Bear and Chase

brute force, dfs and similar, graphs, implementation, math, probabilities

Triangle Platinum?

brute force, combinatorics, implementation, interactive, math, probabilities

Fibonacci Number

brute force, math, matrices

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

MEX Game 2 (Easy Version)

binary search, brute force, greedy

RC Kaboom Show

binary search, brute force, data structures, geometry, math

Substring Search

bitmasks, brute force, fft

Graph Coloring (hard version)

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

Large Refrigerator

brute force

Make Symmetrical

brute force

Graph And Numbers

bitmasks, brute force, combinatorics, dp, meet-in-the-middle

Cute number

binary search, brute force, data structures, dsu, implementation, math

Tricolor Triangles

brute force, graphs, math, matrices

Pumping Stations

brute force, dfs and similar, divide and conquer, flows, graphs, greedy, trees

Subsequence

brute force, divide and conquer, dp, greedy, trees

Odd Mineral Resource

binary search, bitmasks, brute force, data structures, probabilities, trees

Ghd

brute force, math, probabilities

The Overdosing Ubiquity

brute force, dfs and similar, graphs

Familiar Operations

brute force, graphs, math

Sign Posts

brute force, geometry, math

Goblins And Gnomes

brute force, dp, flows, graph matchings

Shrink-Reverse

binary search, brute force, greedy, hashing, implementation, string suffix structures, strings

Kingdom of Islands

brute force, graphs, implementation

Matching Reduction

brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive

Boolean Computer

bitmasks, brute force, fft, math

Random Elections

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

Delivery Oligopoly

brute force, dp, graphs

Maxim and Calculator

brute force, dp, two pointers

Minibuses on Venus (hard version)

brute force, combinatorics, dp, math

Last Man Standing

brute force, data structures, number theory