Expansion coefficient of the array

implementation, math

A pile of stones

implementation, math

The Party and Sweets

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

Reachable Numbers

implementation

Optimizer

graphs, greedy, hashing, implementation

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Game with Telephone Numbers

games, greedy, implementation

Reverse a Substring

implementation, sortings, strings

Two Teams

data structures, implementation, sortings

Gourmet Cat

implementation, math

Neko Finds Grapes

greedy, implementation, math

Tiling Challenge

greedy, implementation

Stock Arbitraging

greedy, implementation

Tree Generator™

data structures, implementation, trees

Three Religions

dp, implementation, strings

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Hate "A"

implementation, strings

Love "A"

implementation, strings

Pigeon d'Or

implementation

Thanos Sort

implementation

Parity Alternated Deletions

greedy, implementation, sortings

Diverse Strings

implementation, strings

The Doors

implementation

Colored Boots

greedy, implementation

Maximal Continuous Rest

implementation

Game 23

implementation, math

Good String

implementation, strings

Detective Book

implementation

Chocolates

greedy, implementation

Even Substrings

implementation, strings

Sushi for Two

binary search, greedy, implementation

Museums Tour

dp, graphs, implementation

Skyscrapers

implementation, sortings

Nastya Is Reading a Book

implementation

Middle of the Contest

implementation

Regular Bracket Sequence

greedy, implementation

Draw!

greedy, implementation

Be Positive

implementation

System Testing

implementation

Mike and Children

brute force, implementation

Technogoblet of Fire

implementation, sortings

Once in a casino

constructive algorithms, greedy, implementation, math

Diana and Liana

greedy, implementation, two pointers

Get Ready for the Battle

constructive algorithms, implementation

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Ilya and a Colorful Walk

greedy, implementation

Yet Another Ball Problem

constructive algorithms, implementation

Palindromic Matrix

constructive algorithms, implementation

Tanya and Candies

implementation

Best Subsegment

implementation, math

Trailing Loves (or L'oeufs?)

brute force, implementation, math, number theory

Got Any Grapes?

brute force, greedy, implementation

Average Superhero Gang Power

brute force, implementation, math

Superhero Transformation

implementation, strings

Sasha and a Patient Friend

binary search, data structures, implementation

Sasha and a Bit of Relax

dp, implementation

Array and Segments (Hard version)

data structures, implementation

Array and Segments (Easy version)

brute force, greedy, implementation

Two distinct points

implementation

Compression

dp, implementation, math, number theory

Lunar New Year and Number Division

greedy, implementation, math, sortings

Lunar New Year and Food Ordering

data structures, implementation

Lunar New Year and Cross Counting

implementation

Kilani and the Game

dfs and similar, graphs, implementation, shortest paths

Zuhair and Strings

brute force, implementation, strings

Salem and Sticks

brute force, implementation

Game with string

data structures, implementation, math

Splitting into digits

constructive algorithms, implementation, math

Grid game

constructive algorithms, implementation

Polycarp's New Job

implementation

Accordion

greedy, implementation

Build a Contest

data structures, implementation

Roman and Browser

implementation

Postcard

constructive algorithms, implementation

Snowball

implementation

Fedya the Potter

binary search, implementation, math, number theory

Yuhao and a Parenthesis

greedy, implementation

Gennady and a Card Game

brute force, implementation

Find Divisible

greedy, implementation, math

Almost Regular Bracket Sequence

implementation

Circular Dance

implementation

Array Stabilization

implementation

Repeating Cipher

implementation

Great Vova Wall (Version 2)

data structures, implementation

Great Vova Wall (Version 1)

greedy, implementation, math

Uniform String

implementation

New Year and the Acquaintance Estimation

binary search, data structures, graphs, greedy, implementation, math, sortings

New Year and the Treasure Geolocation

brute force, constructive algorithms, greedy, implementation

New Year and the Christmas Ornament

brute force, implementation, math

The Pleasant Walk

implementation

Combostone

games, implementation

JS Minification

greedy, implementation

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Ehab and subtraction

implementation, sortings

Vasya and Templates

greedy, implementation, strings

Minimum Diameter Tree

constructive algorithms, implementation, trees

Connect Three

implementation, math

Right-Left Cipher

implementation, strings

The Fair Nut and String

combinatorics, dp, implementation

Kvass and the Fair Nut

greedy, implementation