Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Match Points

binary search, greedy, sortings, ternary search, two pointers

Guess the Root

brute force, interactive, math

Minimum Possible LCM

brute force, greedy, math, number theory

Shovels Shop

dp, greedy, sortings

Serval and Snake

binary search, brute force, interactive

Neko and Flashback

constructive algorithms, dfs and similar, graphs

Neko and Aki's Prank

dp, greedy, trees

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Number of Components

combinatorics, data structures, dp, math

Three Religions

dp, implementation, strings

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

Palindrome XOR

dfs and similar, graphs

Thanos Nim

games

Leaf Partition

dp, trees

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Frog Jumping

dfs and similar, math, number theory

Two Merged Sequences

dp, greedy

U2

geometry

Lynyrd Skynyrd

data structures, dfs and similar, dp, math, trees

Palindrome-less Arrays

combinatorics, divide and conquer, dp

Dish Shopping

data structures, divide and conquer

Maximize Mex

flows, graph matchings, graphs

Steps to One

dp, math, number theory, probabilities

Cooperative Game

constructive algorithms, interactive, number theory

Museums Tour

dp, graphs, implementation

Nastya Hasn't Written a Legend

binary search, data structures

Greedy Subsequences

data structures, dp, trees

Clear the String

dp

Knapsack

dfs and similar, dp, greedy

Stressful Training

binary search, greedy

String Multiplication

dp, greedy, strings

Gourmet choice

dfs and similar, dp, dsu, graphs, greedy

Morse Code

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

Wrong Answer

constructive algorithms

Power Tree

dfs and similar, dp, dsu, graphs, greedy, trees

Compress String

dp, strings

Recursive Queries

data structures

Crisp String

bitmasks, dp

Decypher the String

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

Magic Gems

dp, math, matrices

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory

Arithmetic Progression

binary search, interactive, number theory, probabilities

Tree

data structures, dfs and similar, dp, graphs, trees

Magic Stones

constructive algorithms, math, sortings

Jongmah

dp

Sasha and Interesting Fact from Graph Theory

brute force, combinatorics, dp, math, trees

MST Unification

binary search, dsu, graphs, greedy

Array and Segments (Hard version)

data structures, implementation

Vasya and Maximum Profit

binary search, constructive algorithms, data structures, dp, dsu

Vasya and Binary String

dp

Lunar New Year and a Recursive Sequence

math, matrices, number theory

Lunar New Year and Red Envelopes

data structures, dp

Helping Hiasat

bitmasks, brute force, dp, meet-in-the-middle

Game with modulo

binary search, constructive algorithms, interactive

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

(Zero XOR Subset)-less

math, matrices

Trucks and Cities

binary search, dp

GCD Counting

data structures, dfs and similar, dp, number theory, trees

Ivan and Burgers

data structures, divide and conquer, greedy, math

Andrew and Taxi

binary search, dfs and similar, graphs

Dasha and Chess

constructive algorithms, games, interactive

Cookies

binary search, data structures, dfs and similar, dp, games, trees

Construct a tree

binary search, constructive algorithms, dfs and similar, graphs, greedy, trees

Nice table

brute force, constructive algorithms, greedy, math

Alex and a TV Show

bitmasks, combinatorics, number theory

Makoto and a Blackboard

dp, math, number theory, probabilities

Lucky Tickets

divide and conquer, dp, fft

Inversion Expectation

dp, math, probabilities

The Top Scorer

combinatorics, dp, math, probabilities

Multidimensional Queries

bitmasks, data structures

Vasya and Array

dp

Intersection of Permutations

data structures

Minimal Diameter Forest

constructive algorithms, dfs and similar, greedy, trees

Great Vova Wall (Version 2)

data structures, implementation

Great Vova Wall (Version 1)

greedy, implementation, math

New Year and the Acquaintance Estimation

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

Berland University

greedy, math

Right Expansion Of The Mind

math

Minimal Product

Combostone

games, implementation

Horseback Riding

flows, graphs

New Year Presents

constructive algorithms, data structures

Minegraphed

constructive algorithms, graphs

King Kog's Reception

data structures

Cactus Search

interactive

Alice the Fan

dp

Ehab and a component choosing problem

dp, greedy, math, trees

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Rock-Paper-Scissors Champion

Vasya and Templates

greedy, implementation, strings

The Fair Nut and Rectangles

data structures, dp, geometry

The Fair Nut and Strings

greedy, strings

Petya and Graph

flows, graphs

Increasing Frequency

binary search, dp, greedy

Katya and Segments Sets

data structures, interactive, sortings

Sonya and Matrix Beauty

strings

Olya and magical square

constructive algorithms, implementation, math

Pictures with Kittens (hard version)

data structures, dp