They Are Everywhere

binary search, strings, two pointers

NP-Hard Problem

dfs and similar, graphs

Sweets Eating

dp, greedy, math, sortings

Air Conditioners

data structures, dp, implementation, shortest paths, sortings, two pointers

Motarack's Birthday

binary search, greedy, ternary search

Fight with Monsters

greedy, sortings

Lunar New Year and a Wander

data structures, dfs and similar, graphs, greedy, shortest paths

And Matching

bitmasks, constructive algorithms

Power Sequence

brute force, math, number theory, sortings

Yet Another Walking Robot

data structures, implementation

Price Maximization

binary search, greedy, math, two pointers

Cyclic Permutations

combinatorics, dp, graphs, math

Bear and Friendship Condition

dfs and similar, dsu, graphs

Sage's Birthday (hard version)

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

Balanced Bitstring

implementation, strings

Killjoy

greedy, implementation, math

Running for Gold

combinatorics, graphs, greedy, sortings

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Equalize the Array

binary search, data structures, greedy, math, sortings

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Maximum width

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

K-Complete Word

dfs and similar, dsu, greedy, implementation, strings

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Remove One Element

brute force, dp

Journey

dfs and similar, dp, graphs, probabilities, trees

Binary String Reconstruction

constructive algorithms, dfs and similar, math

Burning Midnight Oil

binary search, implementation

Binary String Reconstruction

2-sat, brute force, constructive algorithms, greedy

Pythagorean Triples

binary search, brute force, math, number theory

Omkar and Baseball

constructive algorithms, math

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Zero Array

greedy, math

AGAGA XOOORRR

bitmasks, brute force, dp, greedy

Vasya and String

binary search, dp, strings, two pointers

Mortal Kombat Tower

dp, graphs, greedy, shortest paths

a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Interesting Function

binary search, dp, math, number theory

Good String

brute force, dp, greedy, two pointers

Decrease the Sum of Digits

greedy, math

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

Cyclic Components

dfs and similar, dsu, graphs

Special Elements

brute force, implementation, two pointers

Tetrahedron

dp, math, matrices

Potions (Easy Version)

brute force, data structures, dp, greedy

Plus and Multiply

constructive algorithms, math, number theory

Powered Addition

greedy, math

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

Kefa and Company

binary search, sortings, two pointers

Winner

hashing, implementation

Woodcutters

dp, greedy

Divisibility by Eight

brute force, dp, math

Two Substrings

brute force, dp, greedy, implementation, strings

Kefa and Park

dfs and similar, graphs, trees

Boredom

dp

Binary Notation

*special problem, implementation

Chocolate Bar

*special problem, math

LCM

*special problem, implementation, math

HQ9+

*special problem, implementation

A+B

*special problem, implementation

Gnikool Ssalg

*special problem, implementation, strings

Этажи

constructive algorithms

Oracle for f(x) = k-th element of x

*special problem

Generate GHZ state

*special problem

Crystal Ball Sequence

*special problem, implementation

Distinguish plus state and minus state

*special problem

Generate Bell state

*special problem

Копирование файлов II

*special problem, binary search, brute force, math

Binary Blocks

brute force

Polycarp and the Language of Gods

*special problem, implementation, two pointers

Boot Camp

*special problem, greedy

Oh Sweet Beaverette

brute force, implementation

Plane of Tanks: Pro

implementation

Draw Brackets!

*special problem, implementation

Death Stars (easy)

implementation

Heroes

brute force, implementation

Crash

implementation

Orange

*special problem, implementation

DDoS

*special problem, brute force

Three Sons

brute force

Hyperspace Jump (easy)

expression parsing, math

Blinds

brute force

Fly, freebies, fly!

binary search, brute force, implementation

Special Task

math

File List

dp, greedy, implementation

TCMCF+++

greedy

Jeopardy!

greedy, math

Robot Bicorn Attack

brute force, implementation

Promocodes with Mistakes

*special problem, brute force, constructive algorithms, implementation

Datatypes

math, sortings

Friends or Not

*special problem, greedy, implementation

Name Quest

*special problem, greedy

Прокат велосипедов

*special problem, greedy, implementation

Chat

*special problem, dp

Banana

binary search, constructive algorithms, greedy

World Football Cup

implementation

Measuring Lengths in Baden

math

Put Knight!

games, math

Splitting money

implementation

Guilty --- to the kitchen!

greedy, implementation

String Manipulation 1.0

*special problem, binary search, brute force, data structures, strings