Bracket Coloring

constructive algorithms, greedy

k-th equality

brute force, implementation, math

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Round Dance

dfs and similar, dsu, graphs, shortest paths

Flipper

brute force, constructive algorithms, greedy

Copil Copac Draws Trees

dfs and similar, dp, graphs, trees

Don't Blame Me

bitmasks, combinatorics, dp, math

Hits Different

data structures, dp, implementation, math

Forever Winter

dfs and similar, graphs, math

Running Miles

brute force, dp, greedy

Dreaming of Freedom

greedy, math, number theory

LuoTianyi and the Show

greedy, implementation

Strongly Composite

greedy, math, number theory

Magic Triples (Easy Version)

brute force, data structures, math, number theory

Gardening Friends

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

Making Anti-Palindromes

greedy, math, strings

Tear It Apart

brute force, implementation, math, strings

Constructive Problem

brute force, greedy

Almost Increasing Subsequence

binary search, data structures, greedy

Ian and Array Sorting

greedy, math

Search in Parallel

constructive algorithms, greedy, sortings

Long Legs

brute force, math

Living Sequence

binary search, dp, math, number theory

Umka and a Long Flight

constructive algorithms, implementation, math

Climbing the Tree

binary search, math

Make It Permutation

brute force, greedy, sortings

Sum on Subarrays

constructive algorithms, greedy, math

Bouncy Ball

brute force, dfs and similar, implementation

Interview

binary search, implementation, interactive

Sequence Master

brute force, constructive algorithms, math

Place for a Selfie

binary search, data structures, geometry, math

Pull Your Luck

brute force, greedy, math, number theory

The Very Beautiful Blanket

bitmasks, constructive algorithms

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Double Lexicographically Minimum

greedy, strings

Shocking Arrangement

constructive algorithms, greedy, math

Candy Store

greedy, math, number theory

Li Hua and Chess

constructive algorithms, greedy, interactive

Maximum Set

binary search, math

Triangle Coloring

combinatorics, math

Tea Tasting

binary search, data structures, implementation

Scoring Subsequences

binary search, greedy, math, two pointers

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings

Min Max Sort

binary search, brute force, greedy, math, two pointers

Range Update Point Query

binary search, brute force, data structures

Vlad and a Pair of Numbers

bitmasks, constructive algorithms

Serval and Toxel's Arrays

combinatorics, dp, implementation, math

Matching Numbers

constructive algorithms, greedy, math

Remove the Bracket

dp, greedy, math

Cake Assembly Line

brute force, sortings

Yet Another Tournament

binary search, greedy, sortings

Equal Frequencies

brute force, constructive algorithms, greedy, implementation, sortings, strings

Boris and His Amazing Haircut

constructive algorithms, data structures, dp, dsu, greedy, sortings

Least Prefix Sum

data structures, greedy

Flexible String

bitmasks, brute force, strings

The Forbidden Permutation

greedy, math

Quiz Master

binary search, math, number theory, sortings, two pointers

Controllers

binary search, math

Beppa and SwerChat

two pointers

Train Splitting

constructive algorithms, graphs, greedy

Interesting Sequence

bitmasks, math

Gardener and the Array

bitmasks, constructive algorithms

Same Count One

brute force, constructive algorithms, greedy, implementation, two pointers

Ice and Fire

constructive algorithms, dp, greedy

Coloring

constructive algorithms, greedy, math

Easy Assembly

greedy, sortings

Permutation Game

games

Absolute Sorting

constructive algorithms, math

Hossam and Trainees

greedy, math, number theory

Hossam and Friends

binary search, constructive algorithms, dp, two pointers

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Подкрутка II

*special problem, dp

Копирование файлов II

*special problem, binary search, brute force, math

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Playoff

combinatorics, constructive algorithms, dp, greedy, math

Lucky Chains

math, number theory

Hamiltonian Wall

dp, implementation

Number Reduction

greedy

Torus Path

greedy, math

Watch the Videos

binary search, constructive algorithms, two pointers

Doremy's City Construction

graphs, greedy

Binary Strings are Fun

combinatorics, math

Set Construction

constructive algorithms, dfs and similar, graphs, greedy

SlavicG's Favorite Problem

bitmasks, dfs and similar, graphs

Quests

binary search, greedy, sortings

The Humanoid

brute force, dp, sortings

Make It Round

brute force, number theory

Almost All Multiples

greedy, number theory

Factorial Divisibility

math, number theory

Make Nonzero Sum (hard version)

constructive algorithms, dp, greedy

Make Nonzero Sum (easy version)

constructive algorithms, dp, greedy

Complementary XOR

constructive algorithms, implementation

Number Game

binary search, data structures, games, greedy, implementation

Zero-Sum Prefixes

brute force, data structures, dp, greedy, implementation

Diverse Substrings

brute force, implementation, strings

Permutation Operations

constructive algorithms, greedy, implementation, math

Divisible Numbers (easy version)

brute force, math, number theory

Problem with Random Tests

brute force, dp, greedy, probabilities

Orray

bitmasks, brute force, greedy, math, sortings