Weird Chess

brute force, constructive algorithms, implementation

Sereja ans Anagrams

binary search, data structures

1-2-3

graphs, implementation

Anthem of Berland

dp, strings

QR code

*special problem, implementation

Divisible by Twenty-Five

brute force, dfs and similar, dp

Digits Sequence (Hard Edition)

binary search, divide and conquer, implementation

Ryouko's Memory Note

implementation, math, sortings

Pinball

binary search, data structures, implementation, math, two pointers

MEX Queries

binary search, data structures, trees

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Happy Line

constructive algorithms, greedy, sortings

Messages

brute force, dp, greedy, probabilities, sortings

I'm Feeling Lucky!

probabilities

Monster Invaders

dp, greedy, implementation

Lexicographically Small Enough

brute force, data structures, greedy, strings

Sum

math

Learning to Paint

binary search, data structures, dfs and similar, dp, greedy, implementation, sortings

Remove Directed Edges

dfs and similar, dp, graphs

Reverse Card (Hard Version)

brute force, math, number theory

Segment Sum

bitmasks, combinatorics, dp, math

Minimum and Maximum

constructive algorithms, interactive

Voting (Hard Version)

binary search, data structures, greedy

Neko and Aki's Prank

dp, greedy, trees

Cunning Gena

bitmasks, dp, greedy, sortings

Load Testing

greedy

Handshakes

binary search, constructive algorithms, data structures, greedy

Memory Manager

implementation

Arpa’s overnight party and Mehrdad’s silent entering

constructive algorithms, dfs and similar, graphs

Vasily the Bear and Sequence

brute force, greedy, implementation, number theory

Queue

constructive algorithms, greedy, sortings

Yet Another Substring Reverse

bitmasks, dp

Two strings

binary search, hashing, strings, two pointers

Ring Road 2

2-sat, dfs and similar, dsu, graphs

Kuroni and the Punishment

math, number theory, probabilities

Xor-sequences

matrices

Qpwoeirut and Vertices

binary search, data structures, dfs and similar, divide and conquer, dsu, greedy, trees

Figure Fixing

constructive algorithms, dfs and similar, dsu, graphs, greedy, math

Edges in MST

dfs and similar, dsu, graphs, sortings

Super M

dfs and similar, dp, graphs, trees

Kill Anton

brute force, constructive algorithms, data structures, math, strings

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

Rain

binary search, brute force, data structures, geometry, greedy, implementation, math

Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Monitor

binary search, data structures

Counting Binary Strings

combinatorics, dp, math

Mars rover

dfs and similar, graphs, implementation, trees

Omkar and Forest

combinatorics, graphs, math, shortest paths

Permutation Separation

data structures, divide and conquer

The Road to Berland is Paved With Good Intentions

2-sat, dfs and similar, dsu, graphs

Literature Lesson

implementation

Robot Bicorn Attack

brute force, implementation

Delivery Bears

binary search, flows, graphs

Counting Shortcuts

data structures, dfs and similar, dp, graphs, shortest paths

Wi-Fi

data structures, dp, greedy

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Driving Test

data structures, dp, greedy

Sum of Nestings

constructive algorithms

Red-Black Number

dfs and similar, dp, implementation, math, meet-in-the-middle

And Reachability

bitmasks, dp

Misha and Permutations Summation

data structures

Carry Bit

combinatorics, math

Anonymity Is Important

binary search, brute force, data structures, dsu, greedy, sortings

Array

combinatorics, math

Pick Heroes

greedy, implementation, interactive, sortings

Lunar New Year and Red Envelopes

data structures, dp

Mike and Frog

brute force, greedy, implementation, math

Connected Components

data structures, dfs and similar, dp, dsu

Pudding Monsters

data structures, divide and conquer

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Imbalance Value of a Tree

data structures, dsu, graphs, trees

Felicity is Coming!

data structures, hashing, sortings, strings

Berzerk

dfs and similar, dp, games

Triangle Construction

greedy, math

Work Group

dfs and similar, dp, graphs, strings, trees

Jeopardy!

greedy, math

Divisors

interactive, math, number theory

TCMCF+++

greedy

Ant on the Tree

constructive algorithms, dfs and similar, trees

Iahub and Permutations

combinatorics, math

Magic Triples (Hard Version)

brute force, data structures, math, number theory

Power Board

brute force, dp, math, number theory

Rectangle and Square

brute force, geometry, math

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

TV Shows

data structures, greedy, implementation, sortings

Underground Lab

constructive algorithms, dfs and similar, graphs

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Andrew and Taxi

binary search, dfs and similar, graphs

Cipher

combinatorics, dp

Weird journey

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

Candy Box (hard version)

greedy, implementation, sortings

Subway Pursuit

binary search, interactive, probabilities

Jeff and Furik

combinatorics, dp, probabilities

Logo Turtle

dp

Army Creation

binary search, data structures

Candy Party (Hard Version)

bitmasks, constructive algorithms, dp, greedy, implementation, math

Space Harbour

data structures, implementation, math, sortings

Hot Start Up (hard version)

data structures, dp

Analysis of Pathes in Functional Graph

data structures, graphs

Minimal Coverage

dp