Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Strange Addition

brute force, constructive algorithms, implementation

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

Dima and Guards

implementation

Battleship

implementation

Servers

implementation

Om Nom and Dark Park

dfs and similar, greedy, implementation

Finite or not?

implementation, math

Great Vova Wall (Version 1)

greedy, implementation, math

Vasya and Public Transport

greedy, implementation

Accommodation

brute force, dp, greedy, implementation

Skyscrapers

implementation, sortings

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

Progress Bar

implementation, math

Cheap Dinner

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

Multi-judge Solving

greedy, implementation

Masha and geometric depression

brute force, implementation, math

Keyboard

implementation

The Strongest Build

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

Igor and his way to work

dfs and similar, graphs, implementation, shortest paths

Survey in Class

brute force, data structures, greedy, implementation, sortings

Spongebob and Joke

implementation

Petya and Exam

implementation, strings

Robot Collisions

data structures, greedy, implementation, sortings

Efim and Strange Grade

dp, implementation, math

Save Energy!

binary search, implementation, math

Rectangles

geometry, implementation, sortings

Swaps Again

constructive algorithms, implementation, sortings

Poster

greedy, implementation

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Sereja and Algorithm

data structures, implementation

Mind the Gap

implementation

Guess Your Way Out!

implementation, math, trees

Inconvenient Pairs

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

Candies Distribution

constructive algorithms, implementation

Orac and Game of Life

dfs and similar, graphs, implementation, shortest paths

Lucky Mask

brute force, implementation

Blocking Elements

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

Petya's Exams

greedy, implementation, sortings

Taxi drivers and Lyft

implementation, sortings

Trash Problem

data structures, implementation

Constellation

geometry, implementation

Searchlights

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

Different Arrays

brute force, dp, implementation

Curriculum Vitae

brute force, implementation

Organizing SWERC

brute force, implementation

Equalize the Remainders

data structures, greedy, implementation

Polyline

constructive algorithms, implementation

Balanced Removals (Harder)

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

Two Problems

brute force, implementation

Gennady the Dentist

brute force, implementation

Recycling Bottles

dp, geometry, greedy, implementation

Bear and Colors

implementation

Tourist Problem

combinatorics, implementation, math

Sysadmin Bob

greedy, implementation, strings

Shockers

implementation, strings

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Pages

implementation

Multithreading

data structures, greedy, 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

Are You a Procrastinator?

implementation

Big Brush

constructive algorithms, data structures, greedy, implementation

Segment Intersections

brute force, greedy, implementation, math

Subsegments

data structures, implementation

Berstagram

implementation

Maximum Number

*special problem, constructive algorithms, greedy, implementation

The Same Calendar

implementation

Reverse

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

Ehab's Last Corollary

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

Psychos in a Line

data structures, implementation

Tokitsukaze and Meeting

data structures, implementation, math

Tic-Tac-Toe

implementation

Rescheduling the Exam

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

Almost Regular Bracket Sequence

implementation

Robot in a Hallway

data structures, dp, greedy, implementation, ternary search

The Closest Pair

constructive algorithms, implementation