Congruence Equation

chinese remainder theorem, math, number theory

Jamie and To-do List

data structures, interactive, trees

Coprime Arrays

math, number theory

Physical Education Lessons

data structures, implementation, sortings

Almost Acyclic Graph

dfs and similar, graphs

Fishes

data structures, graphs, greedy, probabilities, shortest paths

Colorful Points

data structures, greedy, implementation

New Year and Arbitrary Arrangement

dp, math, probabilities

Seating of Students

brute force, constructive algorithms, math

Clear The Matrix

bitmasks, dp

Swapping Characters

brute force, hashing, implementation, strings

Almost Difference

data structures, math

Bipartite Segments

binary search, data structures, dfs and similar, dsu, graphs, two pointers

GCD of Polynomials

constructive algorithms, math

Maximum Questions

data structures, dp, strings

Letters Removing

data structures, strings

Restoring the Expression

brute force, hashing, math

Eyes Closed

data structures, probabilities

String Mark

combinatorics, math, strings

Ralph and Mushrooms

dp, graphs

Ralph And His Tour in Binary Country

brute force, data structures, trees

Subtree Minimum Query

data structures, trees

Envy

data structures, dsu, graphs

Xor-MST

bitmasks, constructive algorithms, data structures

Boxes And Balls

data structures, greedy

Downloading B++

binary search, implementation

Automatic Door

implementation

Teams Formation

data structures, implementation

Ann and Books

data structures, flows, hashing

Olya and Energy Drinks

data structures, dfs and similar, graphs, shortest paths

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

National Property

2-sat, dfs and similar, graphs, implementation

Awards For Contestants

brute force, data structures, dp

Points, Lines and Ready-made Titles

dfs and similar, dsu, graphs, trees

Huge Strings

bitmasks, brute force, dp, implementation, strings

Almost Permutation

flows

Mahmoud and Ehab and the function

binary search, data structures, sortings

Desk Disorder

combinatorics, dfs and similar, dsu, graphs, trees

Third Month Insanity

dp, probabilities, trees

Wizard's Tour

constructive algorithms, dfs and similar, graphs

Tests Renumeration

greedy, implementation

Similar Words

dp, hashing, strings, trees

Salazar Slytherin's Locket

bitmasks, dp

Boredom

data structures

Dating

brute force, dfs and similar, graphs, trees

Product transformation

combinatorics, math, number theory

Casinos and travel

dp

Exploration plan

binary search, flows, graph matchings, shortest paths

Property

greedy, sortings

Arpa and a game with Mojtaba

bitmasks, dp, games

Arpa and a list of numbers

implementation, number theory

Berland Elections

greedy, sortings

Dog Show

constructive algorithms, data structures, greedy

Chemistry in Berland

dfs and similar, greedy, trees

Shortest Path Problem?

dfs and similar, graphs, math

Leha and another game about graph

constructive algorithms, data structures, dfs and similar, dp, graphs

Winter is here

combinatorics, dp, math, number theory

Convex Countour

dp

Diverging Directions

data structures, dfs and similar, trees

Vasya's Function

binary search, implementation, math

Round Subset

dp, math

The Bakery

binary search, data structures, divide and conquer, dp, two pointers

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

DNA Evolution

data structures, strings

Minimal Labels

data structures, dfs and similar, graphs, greedy

Okabe and El Psy Kongroo

dp, matrices

Okabe and City

dfs and similar, graphs, shortest paths

Mister B and Boring Game

games, greedy

Level Generation

binary search, math, ternary search

MEX Queries

binary search, data structures, trees

Karen and Test

brute force, combinatorics, constructive algorithms, math

Army Creation

binary search, data structures

Sagheer and Apple Tree

games, trees

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Glad to see you!

binary search, interactive

Anthem of Berland

dp, strings

Selling Souvenirs

binary search, dp, greedy, ternary search

Ice cream coloring

constructive algorithms, dfs and similar, greedy

Periodic RMQ Problem

data structures

Send the Fool Further! (medium)

dp, trees

Fake News (hard)

string suffix structures

Fake News (medium)

constructive algorithms, strings

Marmots (medium)

math

Marmots (easy)

math

Field expansion

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

Broken BST

data structures, dfs and similar

Police Stations

constructive algorithms, dfs and similar, dp, graphs, shortest paths, trees

Presents in Bankopolis

dp, graphs, shortest paths

Mice problem

geometry, implementation, math, sortings

The Great Mixing

dfs and similar, graphs, shortest paths

Weird journey

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

Legacy

data structures, graphs, shortest paths

Anton and Permutation

brute force, data structures

Anton and School - 2

combinatorics, dp, math, number theory

Underground Lab

constructive algorithms, dfs and similar, graphs

The Holmes Children

math, number theory

Composing Of String

*special problem, dp

Repairing Of String

*special problem, constructive algorithms

Big Number and Remainder

*special problem, math, number theory

Significant Cups

*special problem, binary search, data structures, two pointers