Socks

dfs and similar, dsu, graphs, greedy

Car Repair Shop

implementation

Minimum and Maximum

constructive algorithms, interactive

Toda 2

greedy, implementation

Sea Battle

constructive algorithms, greedy, math

Road to Cinema

binary search, greedy, sortings

T-shirts Distribution

constructive algorithms, flows, greedy

Guess the Array

constructive algorithms, interactive, math

Bill Total Value

expression parsing, implementation, strings

Contest Balloons

data structures, greedy

Hidden Word

brute force, constructive algorithms, implementation, strings

Ray Tracing

greedy, hashing, implementation, math, number theory, sortings

Batch Sort

brute force, greedy, implementation, math

Lakes in Berland

dfs and similar, dsu, graphs, greedy, implementation

Polycarp at the Radio

greedy

Destroying Array

data structures, dsu

Journey

dp, graphs

Anatoly and Cockroaches

greedy

Efim and Strange Grade

dp, implementation, math

Plus and Square Root

constructive algorithms, math

Sonya and Queries

data structures, implementation

Memory and De-Evolution

greedy, math

Coloring Trees

dp

Chris and Magic Square

constructive algorithms, implementation

Magic Odd Square

constructive algorithms, math

Optimal Point on a Line

brute force, sortings

Checkpoints

greedy, implementation, sortings

Pythagorean Triples

math, number theory

Vasiliy's Multiset

binary search, bitmasks, data structures, trees

Hard problem

dp, strings

Thor

brute force, data structures, implementation

Mishka and trip

implementation, math

Cellular Network

binary search, implementation, two pointers

Powers of Two

brute force, data structures, implementation, math

They Are Everywhere

binary search, strings, two pointers

Connecting Universities

dfs and similar, dp, graphs, trees

One Bomb

implementation

Fix a Tree

constructive algorithms, dfs and similar, dsu, graphs, trees

Vacations

dp

Barnicle

brute force, implementation, math, strings

Puzzles

dfs and similar, math, probabilities, trees

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Swaps in Permutation

dfs and similar, dsu, math

Exponential notation

implementation, strings

s-palindrome

implementation, strings

Photographs (I)

The Wall (medium)

combinatorics

Brain Network (medium)

dfs and similar, graphs, trees

Recover Polygon (easy)

Mike and Chocolate Thieves

binary search, combinatorics, math

Mike and Shortcuts

dfs and similar, graphs, greedy, shortest paths

Mike and Cellphone

brute force, constructive algorithms, implementation

Remainders Game

chinese remainder theorem, math, number theory

NP-Hard Problem

dfs and similar, graphs

Robbers' watch

brute force, combinatorics, dp, math

Reformat the String

*special problem

Hammer throwing

*special problem

Chocolate Bar

*special problem, math

Symmetric Difference

*special problem

The Teacher of Physical Education

*special problem

Alyona and the Tree

dfs and similar, dp, graphs, trees

Heap Operations

constructive algorithms, data structures, greedy

Bear and Prime 100

constructive algorithms, interactive, math

Iterated Linear Function

math, number theory

Joty and Chocolate

implementation, math, number theory

The Same Calendar

implementation

Vanya and Label

bitmasks, combinatorics, implementation, strings

Vanya and Food Processor

implementation, math

Vasya and String

binary search, dp, strings, two pointers

Pyramid of Glasses

implementation, math, math

Tree Construction

data structures, trees

Restoring Painting

brute force, constructive algorithms, math

Recycling Bottles

dp, geometry, greedy, implementation

Correct Bracket Sequence Editor

data structures, dsu, strings

Magic Powder - 2

binary search, implementation

Magic Powder - 1

binary search, brute force, implementation

Reberland Linguistics

dp, implementation, strings

Simple Subset

constructive algorithms, greedy, number theory

Shopping

brute force

Buses Between Cities

implementation

Rebus

constructive algorithms, expression parsing, greedy, math

Hard Process

binary search, dp, two pointers

New Reform

data structures, dfs and similar, dsu, graphs, greedy

Bicycle Race

geometry, implementation, math

Scrambled

*special problem, implementation

Nested Segments

data structures, sortings

Foe Pairs

combinatorics, sortings, two pointers

Gabriel and Caterpillar

implementation, math

Watchmen

data structures, geometry, math

Дефрагментация памяти

constructive algorithms, greedy, implementation

Печать условий

constructive algorithms, greedy, sortings

Этажи

constructive algorithms

Robot Rapping Results Report

binary search, dp, graphs

Enduring Exodus

binary search, two pointers

Processing Queries

*special problem, constructive algorithms, data structures, two pointers

Bear and Two Paths

constructive algorithms, graphs

Bear and Colors

implementation

Little Artem and Dance

brute force, constructive algorithms, implementation

Little Artem and Matrix

implementation

Bear and Forgotten Tree 3

constructive algorithms, graphs, trees