CNF 2

constructive algorithms, dfs and similar, graphs, greedy

Magic Squares

Knights

constructive algorithms

Company Acquisitions

constructive algorithms, math

Broken Monitor

brute force, constructive algorithms, greedy, implementation

Koxia and Sequence

bitmasks, combinatorics, dp, math, number theory

Artistic Partition

divide and conquer, dp, number theory

Olha and Igor

interactive, probabilities, trees

Chip Play

brute force, data structures, implementation

Italian Data Centers

graphs, shortest paths

Dominoes

dfs and similar, graphs

Madhouse (Hard version)

brute force, constructive algorithms, hashing, interactive, math

Maximize the Difference

bitmasks, brute force, dfs and similar

Number of Binominal Coefficients

dp, math, number theory

Robot and Candies

data structures, graph matchings, greedy

Lucky Numbers (Hard Version)

dp, greedy

Strongly Connected Tournament

dp, graphs, math, probabilities

Constants in the language of Shakespeare

constructive algorithms, dp, greedy

Harvester

implementation

Twin Friends

combinatorics, dp

ALT

data structures, flows, graphs, trees

Memory and Casinos

data structures, math, probabilities

Parking Lot

data structures

Tourist

binary search, data structures, dp

Team Arrangement

constructive algorithms, greedy, implementation

Tree Sum

combinatorics, math, trees

Restoring Map

bitmasks, constructive algorithms, trees

Mex Tree

brute force, dp, trees

Present to Mom

binary search, two pointers

Solitaire

brute force, implementation

Distinguish I from X

*special problem

Binary Cards

brute force

Playing with String

games

Misha and Apples

brute force, data structures, dp, two pointers

Heidi and the Turing Test (Medium)

data structures

Maximizing Root

dfs and similar, dp, graphs, math, number theory, trees

BareLee

dfs and similar, dp, games

Bombing

binary search, dp, probabilities

Karen and Cards

binary search, combinatorics, data structures, geometry

Converging Array (Easy Version)

dp, math

MST with Matching

bitmasks, brute force, dsu, graph matchings, trees

Paths

data structures, number theory

Cyclic Coloring

dfs and similar

Triangles

dp, geometry

2-Coloring

combinatorics, dp, math

Compute Power

binary search, dp, greedy

Neko Rules the Catniverse (Large Version)

bitmasks, dp, matrices

Jog Around The Graph

binary search, dp, geometry, graphs

Rainbow Balls

math

Kuro and Topological Parity

dp

Brackets

combinatorics, dp, greedy

Tree

dp

How Many Squares?

implementation

Chemistry Lab

dp, geometry, probabilities

Little C Loves 3 III

bitmasks, dp, math

Plumber

math

Quadratic Set

constructive algorithms, hashing, math, number theory

Clockwork Bomb

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

Occurrences

combinatorics, dfs and similar, dp, dsu, fft, graphs

Minegraphed

constructive algorithms, graphs

Mishka and Divisors

dp, number theory

Robot Arm

data structures, geometry

Igloo Skyscraper

data structures, geometry

Tricolor Triangles

brute force, graphs, math, matrices

Mission Impassable

dp, strings

Matrix Rank (Easy Version)

brute force, combinatorics, dp, math, matrices

AquaMoon and Permutations

2-sat, brute force, combinatorics, constructive algorithms, graph matchings, graphs

Partial Virtual Trees

combinatorics, dfs and similar, dp, math, trees

Beautiful Set

brute force, number theory

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Baby Ehab's Hyper Apartment

binary search, graphs, interactive, sortings, two pointers

Number of Components

data structures

Vanya and Balloons

binary search, brute force, dp, implementation

Security Guard

*special problem, greedy

Bipartite Array

dp, greedy

Strange Sorting

implementation, math

Teams Forming

*special problem, sortings

Spring Cleaning

*special problem, greedy, sortings

Fire in the City

binary search, data structures

Bear and Destroying Subtrees

dp, math, probabilities, trees

Kingdom of Criticism

data structures, dsu

No Game No Life

bitmasks, games, math, matrices

Hidden Bipartite Graph

binary search, constructive algorithms, dfs and similar, graphs, interactive

Cities Excursions

dfs and similar, graphs, trees

Send the Fool Further! (medium)

dp, trees

Trial for Chief

graphs, greedy, shortest paths

Equal Reversal

constructive algorithms, graphs, implementation, math

Euclid Guess

constructive algorithms, flows, graph matchings, math, number theory

Divisor Set

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

Cats on the Upgrade (hard version)

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

Optimal Point

binary search, math

Four Divisors

data structures, dp, math, number theory, sortings, two pointers

New Year and Forgotten Tree

constructive algorithms, flows, graphs

Yet Another Number Sequence

combinatorics, math, matrices

Buses and People

binary search, data structures, sortings

String Counting

combinatorics, dp, fft, math

Tree-Tac-Toe

constructive algorithms, games, trees

Rock-Paper-Scissors Champion

Space Voyage

binary search

Mark and the Online Exam

bitmasks, constructive algorithms, interactive, probabilities