Board Game

games, greedy, implementation, math

Square and Rectangles

implementation

Help General

constructive algorithms, greedy, implementation

Jury Size

brute force, implementation

Haar Features

greedy, implementation

Array and Segments (Hard version)

data structures, implementation

Ray Tracing

greedy, hashing, implementation, math, number theory, sortings

Car Repair Shop

implementation

Kyoya and Permutation

binary search, combinatorics, constructive algorithms, greedy, implementation, math

Borya and Hanabi

bitmasks, brute force, implementation

Fly, freebies, fly!

binary search, brute force, implementation

Are You Fired?

constructive algorithms, data structures, greedy, implementation

Reducing Fractions

implementation, math, number theory, sortings

Spaceship Solitaire

data structures, greedy, implementation

Water Level

brute force, graphs, greedy, implementation, math

Editorial for Two

binary search, data structures, greedy, implementation

Minesweeper 1D

dp, implementation

Sereja and Contest

implementation

Partial Teacher

dp, graphs, greedy, implementation

PLEASE

combinatorics, dp, implementation, math, matrices

MEX of LCM

binary search, data structures, implementation, math, number theory

Места в самолёте

*special problem, implementation

Continued Fractions

brute force, implementation, math

Microtransactions (hard version)

binary search, greedy, implementation

Levko and Array Recovery

greedy, implementation

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Sets

constructive algorithms, hashing, implementation

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

Wizards and Trolleybuses

implementation, math

Lengthening Sticks

combinatorics, implementation, math

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Presents

implementation

Sums of Digits

dp, greedy, implementation

Higher Order Functions

implementation, strings

Messenger

data structures, hashing, implementation, string suffix structures, strings

Arpa and a list of numbers

implementation, number theory

Elevator

implementation, math

Bill Total Value

expression parsing, implementation, strings

Binary Spiders

bitmasks, data structures, implementation, math, sortings, trees

Let Them Slide

data structures, implementation

Valid Bitonic Permutations

combinatorics, dp, implementation, math, number theory

Ice Cream Shop

brute force, implementation, sortings

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Restoring IPv6

implementation, strings

Dima and Containers

constructive algorithms, greedy, implementation

Comments

dfs and similar, expression parsing, implementation, strings

System Testing

implementation

IQ Test

implementation

Mr. Bender and Square

binary search, implementation, math

Symmetree

dfs and similar, hashing, implementation, trees

Balancer

greedy, implementation

Frames

implementation

Sum of Medians

binary search, brute force, data structures, implementation

Lie or Truth

*special problem, constructive algorithms, implementation, sortings

National Property

2-sat, dfs and similar, graphs, implementation

Merging Towers

data structures, dsu, implementation, trees

Cola

implementation

Xenia and Hamming

implementation, math

Robot on the Board 2

brute force, dfs and similar, graphs, implementation

Field of Wonders

implementation, strings

Sequence Formatting

implementation, strings

Twisted Circuit

*special problem, brute force, implementation

Three Religions

dp, implementation, strings

Characteristics of Rectangles

binary search, bitmasks, brute force, implementation, sortings

Accumulator Apex

data structures, implementation, sortings

Game

brute force, dp, implementation

Is This a Zebra?

implementation

Graph and Queries

data structures, dsu, graphs, implementation, trees

Theseus and labyrinth

graphs, implementation, shortest paths

MEX Tree

combinatorics, dfs and similar, implementation, math, trees

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Ela and the Wiring Wizard

brute force, dp, graphs, greedy, implementation, shortest paths

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Tablecity

constructive algorithms, implementation

Nastia Plays with a Tree

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

Colorful Operations

brute force, data structures, implementation

Red-Blue Operations (Hard Version)

binary search, constructive algorithms, greedy, implementation, math

Orange

*special problem, implementation

Harry Potter and Three Spells

implementation, math

Excellent Arrays

binary search, combinatorics, constructive algorithms, implementation, math, sortings, two pointers

Transitive Graph

dfs and similar, dp, dsu, graphs, implementation

Transmigration

implementation

Cheaterius's Problem

implementation

Jabber ID

implementation, strings

Domino

constructive algorithms, implementation

Periodic integer number

implementation, strings

Crash

implementation

Heroes

brute force, implementation

Destroy it!

dp, implementation, sortings

Lights

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

GukiZ and Binary Operations

combinatorics, implementation, math, matrices, number theory

Cakewalk

*special problem, greedy, implementation, shortest paths

Restoration of string

constructive algorithms, graphs, implementation

Schedule

implementation

Big Maximum Sum

data structures, dp, greedy, implementation, math, trees

Is It Flower?

dfs and similar, graphs, implementation

Cinema Cashier

dp, implementation

New School

binary search, data structures, dp, greedy, implementation, sortings

Numbers Exchange

greedy, implementation, math

F1 Champions

implementation