1-2-K Game

games, math

Tokitsukaze, CSL and Stone Game

games

Tokitsukaze and Discard Items

implementation, two pointers

Candies!

data structures, dp, implementation, math

Add on a Tree

trees

Vasya And Array

constructive algorithms, greedy, implementation

Vus the Cossack and Numbers

constructive algorithms, greedy, math

Vus the Cossack and Strings

implementation, math

Extra Element

implementation, math

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Parallel Universes (Easy)

implementation

Heidi and the Turing Test (Easy)

implementation

The Doctor Meets Vader (Easy)

binary search, sortings

Candy Box (easy version)

greedy, sortings

Computer Game

binary search, math

Beautiful Lyrics

data structures, greedy, strings

Split a Number

greedy, implementation, strings

Nick and Array

greedy, implementation

Tolik and His Uncle

constructive algorithms

Valeriy and Deque

data structures, implementation

Prime Graph

constructive algorithms, greedy, math, number theory

Digits Sequence (Hard Edition)

binary search, divide and conquer, implementation

Cover it!

dfs and similar, dsu, graphs, shortest paths, trees

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Electrification

binary search, brute force, greedy

Catch Overflow!

data structures, expression parsing, implementation

Nauuo and Cards

greedy, implementation

Pairs

graphs, implementation

Increasing by Modulo

binary search, greedy

Bicolored RBS

constructive algorithms, greedy

News Distribution

dfs and similar, dsu, graphs

Lost Numbers

brute force, divide and conquer, interactive, math

A Tale of Two Lands

binary search, sortings, two pointers

Two Arrays and Sum of Functions

greedy, math, sortings

Almost All Divisors

math, number theory

Cat Party (Hard Edition)

data structures, implementation

Cat Party (Easy Edition)

data structures, implementation

Double Matrix

brute force, greedy

The Party and Sweets

binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers

Minimum Array

binary search, data structures, greedy

Increasing Subsequence (hard version)

greedy

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Inscribed Figures

geometry

Two Teams

data structures, implementation, sortings

Walking Robot

greedy

Gourmet Cat

implementation, math

Serval and Parenthesis Sequence

greedy, strings

Neko does Maths

brute force, math, number theory

Stas and the Queue at the Buffet

greedy, math, sortings

Problem for Nazar

constructive algorithms, math

Dima and a Bad XOR

bitmasks, brute force, constructive algorithms, dp

Dirty Deeds Done Dirt Cheap

greedy, sortings

Crazy Diamond

constructive algorithms, sortings

Born This Way

binary search, brute force, two pointers

Hide and Seek

graphs

Tree Diameter

bitmasks, graphs, interactive

Graph Without Long Directed Paths

dfs and similar, graphs

Equalize Them All

constructive algorithms, greedy

Queen

dfs and similar, trees

The Beatles

brute force, math

Superhero Battle

math

Colored Boots

greedy, implementation

Polycarp Restores Permutation

math

Playlist

brute force, data structures, sortings

Edgy Trees

dfs and similar, dsu, graphs, math, trees

Circus

brute force, greedy, math, strings

Camp Schedule

greedy, hashing, strings

Skyscrapers

implementation, sortings

Nastya Is Buying Lunch

greedy

Nastya Is Transposing Matrices

constructive algorithms, sortings

Spanning Tree with Maximum Degree

graphs

K Balanced Teams

dp, sortings, two pointers

Zero Quantity Maximization

hashing, math, number theory

Painting the Fence

brute force

Asya And Kittens

constructive algorithms, dsu

Draw!

greedy, implementation

Connect

brute force, dfs and similar, dsu

Toy Train

brute force, greedy

Toy Train (Simplified)

brute force, greedy

System Testing

implementation

Frets On Fire

binary search, sortings

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Tree Cutting (Easy Version)

dfs and similar, trees

Yet Another Ball Problem

constructive algorithms, implementation

Coffee and Coursework (Hard Version)

binary search, greedy

Coffee and Coursework (Easy version)

brute force, greedy

Palindromic Matrix

constructive algorithms, implementation

Block unitary

*special problem

Chessboard unitary

*special problem

Anti-diagonal unitary

*special problem

Palindrome checker oracle

*special problem

OR oracle

*special problem

Trailing Loves (or L'oeufs?)

brute force, implementation, math, number theory

Yet Another Array Partitioning Task

constructive algorithms, greedy, sortings

Creative Snap

binary search, brute force, divide and conquer, math

Average Superhero Gang Power

brute force, implementation, math

Meaningless Operations

constructive algorithms, math, number theory

Tape

greedy, sortings

Sasha and One More Name

constructive algorithms, hashing, strings

Sasha and a Bit of Relax

dp, implementation