Serval and Shift-Shift-Shift

bitmasks, brute force, constructive algorithms, implementation

LaIS

data structures, dp, greedy

Treeland Tour

data structures, dfs and similar, dp, trees

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

Arthur and Brackets

dp, greedy

AI robots

data structures

Monsters (hard version)

data structures, greedy

Banquet Preparations 1

greedy

Jeff and Permutation

greedy

Demiurges Play Again

dfs and similar, dp, math, trees

A Heap of Heaps

brute force, data structures, math, sortings

Trader Problem

data structures, dsu, greedy, sortings

Math

*special problem, math

Vladik and cards

binary search, bitmasks, brute force, dp

AND-MEX Walk

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

Vlad and Avoiding X

bitmasks, brute force, dfs and similar, dp, implementation

Serval and Snake

binary search, brute force, interactive

Graph Coloring

dfs and similar, graphs

Divisors

brute force, dfs and similar, implementation, number theory

Decypher the String

bitmasks, chinese remainder theorem, constructive algorithms, interactive, math

Gift

dsu, graphs, sortings, trees

Glad to see you!

binary search, interactive

Arson In Berland Forest

binary search, graphs, graphs, shortest paths

Numerical Sequence (hard version)

binary search, math

Searching Rectangles

binary search, constructive algorithms, interactive

Number Transformation II

greedy, math

Kirill and Company

bitmasks, brute force, dfs and similar, dp, flows, graphs, shortest paths

Guess the Root

brute force, interactive, math

Interactive Treasure Hunt

brute force, constructive algorithms, geometry, interactive, math

Funny Game

dp, games

Brackets in Implications

constructive algorithms, greedy, implementation, math

Vitaly and Advanced Useless Algorithms

dp, greedy, implementation

GCD of Polynomials

constructive algorithms, math

Arpa and a game with Mojtaba

bitmasks, dp, games

Darth Vader and Tree

dp, matrices

Karen and Test

brute force, combinatorics, constructive algorithms, math

Compressed Tree

dfs and similar, dp, graphs, greedy, sortings, trees

Okabe and City

dfs and similar, graphs, shortest paths

Short Code

data structures, dp, greedy, strings, trees

Network Safety

dfs and similar, dsu, graphs, math, sortings

Appleman and a Sheet of Paper

data structures, implementation

Big Secret

constructive algorithms, math

Radio stations

binary search, data structures

Sereja and Table

bitmasks, greedy

Nikita and stack

data structures

Felicity's Big Secret Revealed

bitmasks, dp

Three Pieces

dfs and similar, dp, shortest paths

Gaining Rating

binary search, greedy, implementation, math, sortings, two pointers

Swapping Characters

brute force, hashing, implementation, strings

Minibuses on Venus (easy version)

combinatorics, divide and conquer, dp

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Couple Cover

brute force, dp, number theory

Vittorio Plays with LEGO Bricks

dp, geometry

Intellectual Inquiry

dp, greedy, strings

Songwriter

greedy, two pointers

Double Happiness

brute force, math, number theory

Hospital Queue

binary search, graphs, greedy, implementation

Banquet Preparations 2

greedy, sortings, two pointers

Bear and Polynomials

hashing, implementation, math

Almost Permutation

flows

Dima and Horses

combinatorics, constructive algorithms, graphs

80-th Level Archeology

brute force, data structures, greedy, sortings

Free Market

dp, greedy

Package Delivery

data structures, divide and conquer, greedy

Hill Climbing

dfs and similar, geometry, trees

Seating of Students

brute force, constructive algorithms, math

Alice the Fan

dp

Mischievous Shooter

brute force, data structures, divide and conquer, dp, implementation

Ralph And His Tour in Binary Country

brute force, data structures, trees

Fancy Stack

combinatorics, dp, implementation

Captains Mode

bitmasks, dp, games

Shifting

implementation

Abbreviation

dp, hashing, strings

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Valera and Fools

dfs and similar, dp, graphs, shortest paths

Largest Beautiful Number

greedy, implementation

Byteland, Berland and Disputed Cities

constructive algorithms, greedy

Deletion of Repeats

greedy, hashing, string suffix structures

Nastya Hasn't Written a Legend

binary search, data structures

Bribes

dfs and similar, graphs, trees

Dog Show

constructive algorithms, data structures, greedy

Lovely Matrix

dfs and similar, graphs, greedy, sortings

Divisor Tree

brute force, number theory, trees

Prime Problem

number theory

Bath Queue

combinatorics, dp, probabilities

Yet Another String Matching Problem

fft, math

George and Interesting Graph

graph matchings

Prairie Partition

binary search, constructive algorithms, greedy, math

Snake

bitmasks, dfs and similar, graphs, implementation

Excitation of Atoms

greedy, implementation

Arthur and Questions

greedy, implementation, math, ternary search

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Chemistry Experiment

binary search, data structures, ternary search

Guard Duty (medium)

binary search, dp, greedy, sortings

Huge Strings

bitmasks, brute force, dp, implementation, strings

Brain Network (hard)

trees

Students' Revenge

data structures, greedy, sortings

Lucky Number Representation

constructive algorithms, dfs and similar, dp

Inverse of Rows and Columns

brute force, constructive algorithms

Run for beer

dfs and similar, shortest paths