Enchanted Matrix

bitmasks, interactive, number theory

Magnets

binary search, constructive algorithms, interactive

Guessing the Greatest (hard version)

binary search, interactive

Guessing the Greatest (easy version)

binary search, interactive

Vabank

binary search, interactive

Searching Local Minimum

binary search, interactive, ternary search

Strange Shuffle

binary search, brute force, constructive algorithms, interactive

The Riddle of the Sphinx

binary search, data structures, data structures, interactive

Bitwise Queries (Hard Version)

bitmasks, constructive algorithms, interactive, math

Bitwise Queries (Easy Version)

bitmasks, constructive algorithms, interactive, math

Finding the Vertex

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

Differentiating Games

games, interactive

Olha and Igor

interactive, probabilities, trees

Rotary Laser Lock

binary search, interactive

Flamingoes of Mystery

interactive

Milutin's Plums

interactive

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Deleting Numbers

interactive, math, number theory

Game of Pairs

constructive algorithms, dfs and similar, interactive, math, number theory

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Omkar and Duck

bitmasks, constructive algorithms, interactive, math

Colors

*special problem, binary search, constructive algorithms, interactive

Integer Game

constructive algorithms, games, interactive, math

Omkar and Modes

binary search, divide and conquer, interactive

The Hidden Pair (Hard Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

The Hidden Pair (Easy Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

Lamps on a Circle

games, implementation, interactive, math

Secure Password

bitmasks, combinatorics, constructive algorithms, interactive, math

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

Guess The Maximums

binary search, implementation, interactive, math

Guess Divisors Count

constructive algorithms, interactive, number theory

Find a Gift

binary search, interactive, probabilities

Yui and Mahjong Set

constructive algorithms, interactive

Kuroni and the Celebration

constructive algorithms, dfs and similar, interactive, trees

So Mean

interactive, math

Rin and The Unknown Flower

constructive algorithms, greedy, interactive, math

Coffee Varieties (easy version)

graphs, interactive

Coffee Varieties (hard version)

constructive algorithms, graphs, interactive

Madhouse (Hard version)

brute force, constructive algorithms, hashing, interactive, math

Madhouse (Easy version)

brute force, constructive algorithms, interactive, math

Enchanted Artifact

constructive algorithms, interactive, strings

Шардирование постов

*special problem, binary search, interactive

Strange Device

constructive algorithms, interactive, math, sortings

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

Point Ordering

constructive algorithms, geometry, interactive, math

XOR Guessing

bitmasks, interactive, math

Palindromic Paths

implementation, interactive

Knightmare (hard)

graphs, interactive, shortest paths

Knightmare (easy)

graphs, interactive, shortest paths

Alesya and Discrete Math

divide and conquer, interactive

Ehab and the Big Finale

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

Lost Numbers

brute force, divide and conquer, interactive, math

Strange device

binary search, interactive, math, trees

Guess the Root

brute force, interactive, math

Serval and Snake

binary search, brute force, interactive

Zigzag Game

games, interactive

Rainbow Coins

interactive

Tree Diameter

bitmasks, graphs, interactive

AI Takeover

*special problem, interactive

Pink Floyd

graphs, interactive

Cooperative Game

constructive algorithms, interactive, number theory

Legendary Tree

binary search, interactive, trees

Decypher the String

bitmasks, chinese remainder theorem, constructive algorithms, interactive, math

Arithmetic Progression

binary search, interactive, number theory, probabilities

Game with modulo

binary search, constructive algorithms, interactive

Dasha and Chess

constructive algorithms, games, interactive

New Year and the Factorisation Collaboration

interactive, math, number theory

How to Learn You Score

constructive algorithms, interactive

Cactus Search

interactive

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Tricky Interactor

constructive algorithms, implementation, interactive

Katya and Segments Sets

data structures, interactive, sortings

Dwarves, Hats and Extrasensory Abilities

binary search, constructive algorithms, geometry, interactive

Lost Root

interactive, probabilities

Pick Heroes

greedy, implementation, interactive, sortings

Intersecting Subtrees

dfs and similar, interactive, trees

Subway Pursuit

binary search, interactive, probabilities

Hidden Bipartite Graph

binary search, constructive algorithms, dfs and similar, graphs, interactive

Divisors

interactive, math, number theory

Guess the number

dp, interactive

Down or Right

constructive algorithms, interactive, matrices

The hat

binary search, interactive

Rocket

binary search, interactive

Guess two numbers

binary search, interactive

A Map of the Cat

*special problem, brute force, interactive

BuberPool Taxi Optimization

*special problem, interactive

Jamie and To-do List

data structures, interactive, trees

Ithea Plays With Chtholly

binary search, constructive algorithms, games, greedy, interactive

Something with XOR Queries

brute force, interactive, probabilities

Mahmoud and Ehab and the binary string

binary search, divide and conquer, interactive

Interactive LowerBound

brute force, interactive, probabilities

The penguin's game

binary search, constructive algorithms, interactive

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Glad to see you!

binary search, interactive

Finding lines

constructive algorithms, divide and conquer, interactive

Verifying Kingdom

binary search, divide and conquer, interactive, trees

PolandBall and Forest

dfs and similar, dsu, graphs, interactive, trees

Interactive Bulls and Cows (Hard)

brute force, constructive algorithms, interactive

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees