Bear and Different Names

constructive algorithms, greedy

Bear and Friendship Condition

dfs and similar, dsu, graphs

Draw Brackets!

*special problem, implementation

Online Courses In BSU

*special problem, dfs and similar, graphs, implementation

k-Interesting Pairs Of Integers

*special problem, bitmasks, brute force, meet-in-the-middle

Cycle In Maze

*special problem, dfs and similar, graphs, greedy, shortest paths

The Winds of Winter

binary search, data structures

Barrels and boxes

brute force, combinatorics, math, number theory, probabilities

Game of Stones

bitmasks, dp, games

Jon and Orbs

dp, math, probabilities

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Code For 1

constructive algorithms, dfs and similar, divide and conquer

Change-free

greedy

Cartons of milk

binary search, data structures, greedy, sortings, two pointers

Garland

dfs and similar, graphs, greedy, trees

The Queue

brute force, greedy

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Mahmoud and a Dictionary

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

Mahmoud and a Message

brute force, dp, greedy, strings

Math, math everywhere

brute force, dp, math, meet-in-the-middle, number theory

Souvenirs

data structures

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Artsem and Saunders

constructive algorithms, dsu, math

Timofey and our friends animals

data structures, divide and conquer, dsu

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Timofey and remoduling

brute force, implementation, math, number theory

Timofey and rectangles

constructive algorithms, geometry

Timofey and a tree

dfs and similar, dp, dsu, graphs, implementation, trees

Tree nesting

combinatorics, graphs, trees

Radio stations

binary search, data structures

Maximum path

dp, greedy, implementation

Two strings

binary search, hashing, strings, two pointers

USB vs. PS/2

greedy, implementation, sortings, two pointers

k-th divisor

math, number theory

Dasha and Photos

brute force, data structures, dp, implementation

Dasha and Puzzle

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

Dasha and Very Difficult Problem

binary search, brute force, constructive algorithms, greedy, sortings

Dasha and Password

brute force, dp, implementation

Frodo and pillows

binary search, greedy

Geometrical Progression

brute force, math, number theory

Broken Tree

dfs and similar, dp, graphs, greedy, trees

Ability To Convert

constructive algorithms, dp, greedy, math, strings

Unfair Poll

binary search, constructive algorithms, implementation, math

Can Bash Save the Day?

data structures, divide and conquer, graphs, trees

Team Rocket Rises Again

data structures, graphs, shortest paths

Bash Plays with Functions

brute force, combinatorics, dp, number theory

Felicity's Big Secret Revealed

bitmasks, dp

Felicity is Coming!

data structures, hashing, sortings, strings

Bash's Big Day

greedy, math, number theory

Long number

expression parsing, math, number theory

Byteland coins

combinatorics, dp, math

Bacterial Melee

brute force, combinatorics, dp, string suffix structures

Nikita and stack

data structures

Travel Card

binary search, dp

Pavel and barbecue

constructive algorithms, dfs and similar

PolandBall and Many Other Balls

combinatorics, divide and conquer, dp, fft, math, number theory

PolandBall and Gifts

bitmasks, dp, greedy

PolandBall and White-Red graph

constructive algorithms, graphs, shortest paths

PolandBall and Polygon

data structures

Dasha and cyclic table

bitmasks, brute force, fft, strings, trees

Fedor and coupons

binary search, data structures, greedy, sortings

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Interactive Bulls and Cows (Hard)

brute force, constructive algorithms, interactive

Interactive Bulls and Cows (Easy)

brute force, constructive algorithms, implementation

New Year and Snowy Grid

dfs and similar, dsu, graphs, interactive

New Year and Binary Tree Paths

bitmasks, brute force, combinatorics, dp

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees

New Year and Old Subsequence

data structures, divide and conquer, dp, matrices

New Year and Fireworks

brute force, data structures, dfs and similar, dp, implementation

New Year and Rating

binary search, greedy, math

Inversions After Shuffle

data structures, probabilities

Leaving Auction

binary search, data structures

Voting

greedy, implementation, two pointers

Santa Clauses and a Soccer Championship

constructive algorithms, dfs and similar, graphs, trees

Santa Claus and Tangerines

binary search, data structures, greedy, two pointers

Santa Claus and a Palindrome

constructive algorithms, data structures, greedy

Santa Claus and Robot

constructive algorithms, math

Santa Claus and Keyboard Check

implementation, strings

Igor and Interesting Numbers

brute force, combinatorics, dp, math

Comments

dfs and similar, expression parsing, implementation, strings

Winter Is Coming

dp, greedy, sortings

New Roads

constructive algorithms, graphs, trees

Music in Car

data structures, greedy, two pointers

Numbers Exchange

greedy, implementation, math

Green and Black Tea

constructive algorithms, greedy, math

Tram

constructive algorithms, implementation, math

Hongcow Solves A Puzzle

implementation

Hongcow Masters the Cyclic Shift

strings, two pointers

Hongcow Draws a Circle

geometry

Hongcow Buys a Deck of Cards

bitmasks, brute force, dp

Hongcow's Game

bitmasks, divide and conquer, interactive

Hongcow Builds A Nation

dfs and similar, graphs

Vladik and cards

binary search, bitmasks, brute force, dp

Chloe and pleasant prizes

dfs and similar, dp, graphs, trees

Vladik and fractions

brute force, constructive algorithms, math, number theory

Arpa’s obvious problem and Mehrdad’s terrible solution

brute force, math, number theory

Arpa’s abnormal DNA and Mehrdad’s deep interest

data structures, string suffix structures

Arpa’s letter-marked tree and Mehrdad’s Dokhtar-kosh paths

data structures, dfs and similar, trees

Arpa’s overnight party and Mehrdad’s silent entering

constructive algorithms, dfs and similar, graphs

Arpa's weak amphitheater and Mehrdad's valuable Hoses

dfs and similar, dp, dsu