Do you want a date?

implementation, math, sortings

Restore Permutation

binary search, data structures, greedy, implementation

Clique Problem

data structures, dp, greedy, implementation, sortings

Ternary Logic

implementation, math

Strange Addition

brute force, constructive algorithms, implementation

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Football

constructive algorithms, graphs, implementation

School Marks

greedy, implementation

Matrix

combinatorics, data structures, implementation

Unusual Product

implementation, math

Omkar and Medians

data structures, greedy, implementation

Gabriel and Caterpillar

implementation, math

Mail Stamps

data structures, dfs and similar, graphs, implementation

Hacker, pack your bags!

binary search, greedy, implementation, sortings

Too Many Impostors (easy version)

constructive algorithms, implementation, interactive

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Little Elephant and Numbers

implementation

Pokémon Army (hard version)

data structures, divide and conquer, dp, greedy, implementation

Elevator

brute force, implementation, math

Friends

graphs, implementation, math

Servers

implementation

Battleship

implementation

Dima and Guards

implementation

Om Nom and Dark Park

dfs and similar, greedy, implementation

Great Vova Wall (Version 1)

greedy, implementation, math

Finite or not?

implementation, math

Vasya and Public Transport

greedy, implementation

Skyscrapers

implementation, sortings

Accommodation

brute force, dp, greedy, implementation

Array and Segments (Easy version)

brute force, greedy, implementation

Expression Evaluation Error

constructive algorithms, greedy, implementation, math

Bouncing Boomerangs

constructive algorithms, greedy, implementation

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

Farewell Party

constructive algorithms, implementation

Sereja and Contests

greedy, implementation, math

Lefthanders and Righthanders

implementation

Maximum Xor Secondary

data structures, implementation, two pointers

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Keyboard

implementation

Progress Bar

implementation, math

Multi-judge Solving

greedy, implementation

The Strongest Build

binary search, brute force, data structures, dfs and similar, graphs, greedy, hashing, implementation

Survey in Class

brute force, data structures, greedy, implementation, sortings

Masha and geometric depression

brute force, implementation, math

Igor and his way to work

dfs and similar, graphs, implementation, shortest paths

Robot Collisions

data structures, greedy, implementation, sortings

Spongebob and Joke

implementation

Petya and Exam

implementation, strings

Efim and Strange Grade

dp, implementation, math

Save Energy!

binary search, implementation, math

Rectangles

geometry, implementation, sortings

Swaps Again

constructive algorithms, implementation, sortings

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Poster

greedy, implementation

Inconvenient Pairs

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

Sereja and Algorithm

data structures, implementation

Mind the Gap

implementation

Guess Your Way Out!

implementation, math, trees

Blocking Elements

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

Candies Distribution

constructive algorithms, implementation

Lucky Mask

brute force, implementation

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Petya's Exams

greedy, implementation, sortings

Taxi drivers and Lyft

implementation, sortings

Different Arrays

brute force, dp, implementation

Trash Problem

data structures, implementation

Constellation

geometry, implementation

Organizing SWERC

brute force, implementation

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

Curriculum Vitae

brute force, implementation

Equalize the Remainders

data structures, greedy, implementation

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Polyline

constructive algorithms, implementation

Are You a Procrastinator?

implementation

Gennady the Dentist

brute force, implementation

Two Problems

brute force, implementation

Tourist Problem

combinatorics, implementation, math

Recycling Bottles

dp, geometry, greedy, implementation

Bear and Colors

implementation

Sysadmin Bob

greedy, implementation, strings

Shockers

implementation, strings

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Multithreading

data structures, greedy, implementation

Pages

implementation

Obsession with Robots

constructive algorithms, graphs, implementation

Page Numbers

expression parsing, implementation, sortings, strings

Petya and Square

implementation, math

Five-In-a-Row

brute force, implementation

Hexagons

brute force, constructive algorithms, greedy, implementation, math, shortest paths

Big Brush

constructive algorithms, data structures, greedy, implementation

Yet Another Ball Problem

constructive algorithms, implementation

Subsegments

data structures, implementation

Reverse

bitmasks, constructive algorithms, dfs and similar, implementation, math, strings

Berstagram

implementation

Maximum Number

*special problem, constructive algorithms, greedy, implementation

Segment Intersections

brute force, greedy, implementation, math

Psychos in a Line

data structures, implementation

Rescheduling the Exam

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

The Same Calendar

implementation

Tokitsukaze and Meeting

data structures, implementation, math