Array Covering

Cipher

Slalom

data structures, dp

Homework

Cactusophobia

dfs and similar, flows

Closing ceremony

greedy

Anatoly and Cockroaches

greedy

Vitya in the Countryside

implementation

Matvey's Birthday

graphs

Andrew and Chemistry

hashing, trees

Sasha and Array

data structures, math, matrices

Efim and Strange Grade

implementation

Cowboy Beblop at his computer

Pokermon League challenge

probabilities

Underfail

flows

Heroes of Making Magic III

data structures

Paint it really, really dark gray

dfs and similar, flows

Dexterina’s Lab

games, matrices, probabilities

Potions Homework

sortings

R3D3’s Summer Adventure

greedy

Festival Organization

math, number theory

Complete the Word

two pointers

Crazy Computer

implementation

Complete the Permutations

Create a Maze

Digit Tree

divide and conquer

Complete The Graph

binary search, constructive algorithms, graphs, shortest paths

Plus and Square Root

constructive algorithms, math

Filya and Homework

implementation

Meeting of Old Friends

math

Sonya Partymaker

Animals and Puzzle

binary search, data structures

Sonya and Problem Wihtout a Legend

dp, flows, sortings

Searching Rectangles

binary search, constructive algorithms

Sonya and Queries

data structures

Memory and Casinos

data structures, math, probabilities

Memory and Scores

combinatorics, dp

Memory and De-Evolution

greedy, math

Memory and Trident

implementation

Memory and Crow

implementation

ZS and The Birthday Paradox

math, number theory, probabilities

Directed Roads

combinatorics, dfs and similar, graphs, math

Coloring Trees

dp

Chris and Magic Square

constructive algorithms

Bus to Udayland

brute force, implementation

String Set Queries

brute force, data structures, hashing, string suffix structures, strings

Generate a String

dfs and similar, dp

Two Arithmetic Progressions

math

Magic Odd Square

constructive algorithms

Optimal Point on a Line

brute force, sortings

King Moves

implementation

Checkpoints

implementation, sortings

Juicer

implementation

Student's Camp

dp, math

Incorrect Flow

flows

Centroids

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

Recover the String

constructive algorithms, implementation, math

Letters Cyclic Shift

constructive algorithms, implementation

Garlands

data structures

Persistent Bookcase

data structures, dfs and similar, implementation

Pythagorean Triples

math, number theory

Bakery

graphs

Brain's Photos

implementation

Working routine

data structures, implementation

Vasiliy's Multiset

binary search, data structures, trees

Hard problem

dp

Interesting drink

binary search, implementation

Beru-taxi

brute force, geometry, implementation

Spider Man

games

Hulk

implementation

Iron Man

geometry, trees

Captain America

flows

Black Widow

dp, implementation

Ant Man

dp, graphs, greedy

Thor

brute force, data structures, implementation

Mishka and Divisors

dp, number theory

Mishka and Interesting sum

data structures

Chris and Road

geometry, implementation

Mishka and trip

implementation, math

Mishka and Game

implementation

T-Shirts

data structures

Analysis of Pathes in Functional Graph

data structures, graphs

Road to Post Office

math

Cellular Network

binary search, two pointers

Powers of Two

brute force, data structures, implementation

Maximum Increase

dp, greedy, implementation

They Are Everywhere

binary search, two pointers

Cells Not Under Attack

math

Cards

greedy

Cool Slogans

string suffix structures, strings

Huffman Coding on Segment

data structures, greedy

Break Up

dfs and similar

Connecting Universities

dfs and similar, dp, graphs, trees

As Fast As Possible

binary search, math

One Bomb

implementation

Launch of Collider

implementation

Coprime Permutation

combinatorics, number theory

Cron

Limak and Shooting Points

brute force, geometry

LRU

bitmasks, dp, probabilities