Festival Organization

combinatorics, math, number theory

Complete the Word

greedy, two pointers

Crazy Computer

implementation

Complete the Permutations

combinatorics, fft, graphs, math

Create a Maze

constructive algorithms

Digit Tree

dfs and similar, divide and conquer, dsu, trees

Complete The Graph

binary search, constructive algorithms, graphs, shortest paths

Plus and Square Root

constructive algorithms, math

Filya and Homework

implementation, sortings

Meeting of Old Friends

implementation, math

Sonya Partymaker

binary search, dp

Animals and Puzzle

binary search, data structures

Sonya and Problem Wihtout a Legend

dp, sortings

Searching Rectangles

binary search, constructive algorithms, interactive

Sonya and Queries

data structures, implementation

Memory and Casinos

data structures, math, probabilities

Memory and Scores

combinatorics, dp, math

Memory and De-Evolution

greedy, math

Memory and Trident

implementation, strings

Memory and Crow

implementation, math

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, implementation

Bus to Udayland

brute force, implementation

String Set Queries

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

Generate a String

dfs and similar, dp

Two Arithmetic Progressions

math, number theory

Magic Odd Square

constructive algorithms, math

Optimal Point on a Line

brute force, sortings

King Moves

implementation

Checkpoints

greedy, implementation, sortings

Juicer

implementation

Student's Camp

dp, math

Incorrect Flow

flows

Centroids

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

Recover the String

constructive algorithms, greedy, implementation, math

Letters Cyclic Shift

constructive algorithms, greedy, implementation, strings

Garlands

data structures

Persistent Bookcase

bitmasks, 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, bitmasks, data structures, trees

Hard problem

dp, strings

Interesting drink

binary search, dp, implementation

Beru-taxi

brute force, geometry, implementation

Spider Man

games, math

Hulk

implementation

Iron Man

data structures, geometry, trees

Captain America

flows, greedy

Black Widow

dp, graphs, implementation, math

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, implementation, two pointers

Powers of Two

brute force, data structures, implementation, math

Maximum Increase

dp, greedy, implementation

They Are Everywhere

binary search, strings, two pointers

Cells Not Under Attack

data structures, math

Cards

greedy, implementation

Cool Slogans

string suffix structures, strings

Huffman Coding on Segment

data structures, greedy

Break Up

dfs and similar, graphs

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, math

LRU

bitmasks, dp, math, probabilities

Fix a Tree

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

Vacations

dp

Barnicle

brute force, implementation, math, strings

Pineapple Incident

implementation, math

...Dary!

binary search, geometry, two pointers

...Wait for it...

data structures, dsu, trees

Legen...

data structures, dp, matrices, strings

PLEASE

combinatorics, dp, implementation, math, matrices

Puzzles

dfs and similar, math, probabilities, trees

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Couple Cover

brute force, dp, number theory

Xor-sequences

matrices

Swaps in Permutation

dfs and similar, dsu, math

Exponential notation

implementation, strings

s-palindrome

implementation, strings

Fashion in Berland

implementation

Tree of Life (hard)

trees

Tree of Life (medium)

constructive algorithms, hashing, trees

Tree of Life (easy)

Photographs (II)