Candies!

data structures, dp, implementation, math

Add on a Tree: Revolution

constructive algorithms, dfs and similar, implementation, trees

Vasya And Array

constructive algorithms, greedy, implementation

Letters Shop

binary search, implementation, strings

Vus the Cossack and a Graph

dfs and similar, graphs, greedy, implementation

Vus the Cossack and a Field

divide and conquer, implementation, math

Vus the Cossack and Strings

implementation, math

Vus the Cossack and a Contest

implementation

Polycarp and Snakes

brute force, implementation

Extra Element

implementation, math

Email from Polycarp

implementation, strings

Parallel Universes (Easy)

implementation

Heidi and the Turing Test (Easy)

implementation

Candy Box (hard version)

greedy, implementation, sortings

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Nearest Interesting Number

implementation

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

Plus from Picture

dfs and similar, implementation, strings

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Flag

brute force, combinatorics, dp, implementation

Split a Number

greedy, implementation, strings

Nick and Array

greedy, implementation

Alex and a Rhombus

dp, implementation, math

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Valeriy and Deque

data structures, implementation

Digits Sequence (Hard Edition)

binary search, divide and conquer, implementation

Digits Sequence (Easy Edition)

implementation

Destroy it!

dp, implementation, sortings

Lose it!

dp, greedy, implementation

Divide it!

brute force, greedy, implementation

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Catch Overflow!

data structures, expression parsing, implementation

From Hero to Zero

implementation, math

Ehab and the Big Finale

constructive algorithms, divide and conquer, graphs, implementation, interactive, trees

Nauuo and Cards

greedy, implementation

Decoding of Integer Sequences

*special problem, data structures, implementation

Minus and Minus Give Plus

*special problem, implementation, strings

Bad Days

*special problem, implementation

Pairs

graphs, implementation

Circle Metro

implementation, math

Anagram Paths

dp, implementation, trees

Microtransactions (hard version)

binary search, greedy, implementation

Remainder

implementation, math

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Cat Party (Hard Edition)

data structures, implementation

Cat Party (Easy Edition)

data structures, implementation

Zoning Restrictions Again

implementation

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