Unique Array

binary search, data structures, divide and conquer, dp, greedy

Division + LCP (hard version)

binary search, brute force, data structures, divide and conquer, hashing, string suffix structures, strings

Division + LCP (easy version)

binary search, data structures, hashing, string suffix structures, strings

Equal XOR Segments

binary search, data structures

Long Way to be Non-decreasing

binary search, dfs and similar, graphs, implementation, two pointers

Frequency Mismatch (Hard Version)

binary search, data structures, dfs and similar, hashing, probabilities, trees

Frequency Mismatch (Easy Version)

binary search, data structures, divide and conquer, hashing, probabilities, trees

Nene's Game

binary search, brute force, data structures, games, greedy

Chain Reaction

binary search, data structures, dsu, greedy, implementation, math, number theory

Mathematician Takeover

binary search, dfs and similar, math

Growing Trees

binary search, constructive algorithms, flows, graphs, greedy

Thanos Snap

binary search, dp, games, greedy, trees

Battle Cows

binary search, data structures, greedy

Charming Meals

binary search, brute force, greedy, sortings

Tree Cutting

binary search, dp, greedy, implementation, trees

Cook and Porridge

binary search, constructive algorithms, data structures, implementation

Binary Search

binary search, constructive algorithms, greedy

MEX Game 2 (Hard Version)

binary search, greedy, two pointers

MEX Game 2 (Easy Version)

binary search, brute force, greedy

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Grand Finale: Circles

binary search, geometry

Bitwise Paradox

binary search, bitmasks, data structures, greedy, two pointers

Pinball

binary search, data structures, implementation, math, two pointers

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Exam in MAC

binary search, combinatorics, implementation, math

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Turtle vs. Rabbit Race: Optimal Trainings

binary search, implementation, math, ternary search

Lexicographically Largest

binary search, constructive algorithms, data structures, greedy, sortings

Sasha and the Casino

binary search, brute force, constructive algorithms, games, greedy, math

Equalize

binary search, greedy, sortings, two pointers

Find the Different Ones!

binary search, brute force, data structures, dp, dsu, greedy, two pointers

Vlad and an Odd Ordering

binary search, bitmasks, data structures, dp, implementation, math, number theory

Shrink-Reverse

binary search, brute force, greedy, hashing, implementation, string suffix structures, strings

Slimes

binary search, constructive algorithms, data structures, greedy, two pointers

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Smooth Sailing (Easy Version)

binary search, brute force, data structures, dfs and similar, dsu, graphs, shortest paths

Array Repetition

binary search, brute force, dsu, implementation, math

Blocking Elements

binary search, data structures, dp, implementation, two pointers

Can I Square?

binary search, implementation

Palindromic Problem

binary search, data structures, hashing, string suffix structures, strings

Game with Multiset

binary search, bitmasks, brute force, greedy

Sum of Digits of Sums

*special problem, binary search, data structures

Jumping Through Segments

binary search, constructive algorithms

Spaceship Exploration

binary search, geometry

Array Game

binary search, brute force, data structures, sortings, two pointers

Collecting Game

binary search, dp, greedy, sortings, two pointers

Babysitting

2-sat, binary search, data structures, graphs, trees

Maximum And Queries (easy version)

binary search, bitmasks, brute force, greedy

Robot Queries

binary search, data structures, dp, implementation

Getting Points

binary search, brute force, greedy

Landscaping

binary search, geometry, two pointers

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Local Deletions

binary search, data structures, implementation

Ones and Twos

binary search, data structures, divide and conquer, math, two pointers

Matching Arrays

binary search, constructive algorithms, greedy, sortings

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Infinite Card Game

binary search, brute force, data structures, dfs and similar, dp, dsu, games, graphs, greedy, sortings, two pointers

Suspicious logarithms

binary search, brute force, math

Smilo and Monsters

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

Good Colorings

binary search, constructive algorithms, graphs, interactive

Split

binary search, data structures, divide and conquer, dsu, math, trees, two pointers

Minimum Array

binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers

Time Travel

binary search, graphs, shortest paths

Fear of the Dark

binary search, geometry, math

Haunted House

binary search, greedy, math, two pointers

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Dances (Easy version)

binary search, greedy, two pointers

Anya and the Mysterious String

binary search, data structures

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Iva & Pav

binary search, bitmasks, data structures, greedy

Clubstep

binary search, brute force, data structures, greedy, trees

Indefinite Clownfish

binary search, graphs

Money Trees

binary search, greedy, math, two pointers

Building an Aquarium

binary search, sortings

Data Structures Fan

binary search, bitmasks, data structures, dp

Lazy Numbers

binary search, math

Colorful Table

binary search, data structures, dp, implementation, math, two pointers

Lihmuf Balling

binary search, brute force, math

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Grouped Carriages

binary search, data structures, dp, flows, greedy

Freak Joker Process

binary search, data structures, sortings

The Great Equalizer

binary search, data structures, math, sortings

Magic Will Save the World

binary search, bitmasks, brute force, dp

Ice Cream Balls

binary search, combinatorics, constructive algorithms, math

Flower City Fence

binary search, data structures, implementation, sortings

Four Suits

binary search, bitmasks, flows, greedy

Fancy Coins

binary search, brute force, greedy, math

Andrey and Escape from Capygrad

binary search, data structures, dp, dsu, greedy, sortings

Sum and Product

binary search, data structures, math

To Become Max

binary search, brute force, data structures, dp

Michael and Hotel

binary search, interactive, trees

Fibonaccharsis

binary search, brute force, math

Ntarsis' Set

binary search, math, number theory

Vlad and the Mountains

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

Cardboard for Pictures

binary search, geometry, implementation, math

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Max to the Right of Min

binary search, data structures, divide and conquer, dp, dsu, two pointers