Toy Sum

greedy, implementation, math

Balls and Boxes

constructive algorithms, greedy, implementation

Nearest Fraction

brute force, implementation, two pointers

Convex Shape

constructive algorithms, implementation

Bracket Sequence

data structures, expression parsing, implementation

Pick Heroes

greedy, implementation, interactive, sortings

Polo the Penguin and XOR operation

implementation, math

Resource Distribution

binary search, implementation, sortings

George and Number

greedy, implementation

Board Game

games, greedy, implementation, math

Borya and Hanabi

bitmasks, brute force, implementation

Continued Fractions

brute force, implementation, math

Levko and Array Recovery

greedy, implementation

Sets

constructive algorithms, hashing, implementation

Higher Order Functions

implementation, strings

Comments

dfs and similar, expression parsing, implementation, strings

Frames

implementation

Sequence Formatting

implementation, strings

Is This a Zebra?

implementation

Tablecity

constructive algorithms, implementation

Transmigration

implementation

Periodic integer number

implementation, strings

Schedule

implementation

Points

implementation, math

Scrambled

*special problem, implementation

Bulls and Cows

brute force, implementation

Biathlon

binary search, implementation

WTF?

*special problem, graph matchings, implementation, trees

Hit Ball

geometry, implementation, math

Blog Photo

binary search, implementation

Rectangle Puzzle II

implementation, math

Harry Potter and the History of Magic

brute force, greedy, implementation

Treasure Island

brute force, implementation

Bathroom terminal

implementation

Wizards and Minimal Spell

implementation, strings

Help Victoria the Wise

brute force, implementation

Codeforces World Finals

implementation

Corporation Mail

data structures, expression parsing, implementation

Kicker

implementation

Warehouse

implementation

Game of chess unfinished

implementation

Shave Beaver!

implementation

A polyline

*special problem, implementation

Count Triangles

binary search, implementation, math, two pointers

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Dreamoon Likes Coloring

constructive algorithms, greedy, implementation, math

Going Home

brute force, hashing, implementation, math

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Mikasa

binary search, bitmasks, greedy, implementation

Recover an RBS

constructive algorithms, greedy, implementation, strings

Slime

dp, greedy, implementation

Task On The Board

constructive algorithms, greedy, implementation, sortings

Polycarp and String Transformation

binary search, implementation, sortings, strings

Playoff Tournament

data structures, dfs and similar, dp, implementation, trees

Exam in MAC

binary search, combinatorics, implementation, math

Paint the Tree

brute force, constructive algorithms, dp, graphs, implementation, trees

Minimum Euler Cycle

constructive algorithms, graphs, greedy, implementation

Tic-tac-toe

brute force, games, implementation

Rudolf and Snowflakes (hard version)

binary search, brute force, implementation, math

Prefix Purchase

greedy, implementation, sortings

Tokitsukaze and Good 01-String (hard version)

dp, greedy, implementation

BA-String

brute force, dp, greedy, implementation, math

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Vasya And Array

constructive algorithms, greedy, implementation

Two Teams

data structures, implementation, sortings

Vus the Cossack and Strings

implementation, math

Selling a Menagerie

dfs and similar, dsu, graphs, implementation, math

Moscow Gorillas

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

Molly's Chemicals

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

Compressed Bracket Sequence

brute force, implementation

Busy Robot

implementation

Max GEQ Sum

binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Cyclic Operations

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation

Vessels

data structures, dsu, implementation, trees

Rating Compression

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

Boxes Packing

binary search, implementation

Ksyusha and Chinchilla

constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees

Cloud of Hashtags

binary search, greedy, implementation, strings

Desktop Rearrangement

data structures, greedy, implementation

Nauuo and Cards

greedy, implementation

Clique Problem

data structures, dp, greedy, implementation, sortings

Too Many Impostors (easy version)

constructive algorithms, implementation, interactive

Array and Segments (Easy version)

brute force, greedy, implementation

Maximum Xor Secondary

data structures, implementation, two pointers

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Gennady the Dentist

brute force, implementation

Recycling Bottles

dp, geometry, greedy, implementation

Subsegments

data structures, implementation

Fun with Integers

dfs and similar, graphs, implementation, math

Almost Sorted

binary search, combinatorics, constructive algorithms, implementation

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

ZgukistringZ

brute force, constructive algorithms, implementation, strings

Beingawesomeism

implementation, math

Compression

dp, implementation, math, number theory

Fight the Monster

binary search, brute force, implementation

Vasya And The Mushrooms

dp, implementation

Connected Component on a Chessboard

constructive algorithms, implementation

Fountains

binary search, data structures, implementation