Convex Shape

constructive algorithms, implementation

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Video Cards

brute force, data structures, implementation, math, number theory

Simple XML

implementation

Guilty --- to the kitchen!

greedy, implementation

Portals

data structures, dp, greedy, implementation, sortings

Segments Removal

data structures, dsu, flows, implementation, two pointers

Turing Tape

implementation

Maximize Sum of Digits

*special problem, implementation, math

Testing Robots

implementation

Splitting money

implementation

Factorial

*special problem, implementation

Sum of Remainders

implementation, math, number theory

Pseudorandom Sequence Period

*special problem, implementation, number theory

Jeff and Rounding

dp, greedy, implementation, math

Domino (hard version)

constructive algorithms, implementation, math

Inna and Dima

dfs and similar, dp, graphs, implementation

Spy Syndrome 2

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

Clique Partition

brute force, constructive algorithms, graphs, greedy, implementation

SMSC

implementation

Counting Sticks

brute force, implementation

Barcelonian Distance

geometry, implementation

Just Arrange the Icons

greedy, implementation, math

World Football Cup

implementation

Multiplication Table

implementation

Promising String (hard version)

data structures, implementation, math, strings

Land Lot

brute force, implementation

Hidden Word

brute force, constructive algorithms, implementation, strings

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Game with String

implementation, probabilities, strings

Editor

data structures, implementation

Twin Buildings

greedy, implementation

On Segment's Own Points

implementation

Rotate, Flip and Zoom

*special problem, implementation

Fibonacci-ish

brute force, dp, hashing, implementation, math

Game on Paper

brute force, implementation

Data Recovery

implementation

Online Courses In BSU

*special problem, dfs and similar, graphs, implementation

Priority Queue

combinatorics, dp, implementation, math, ternary search

Cardiogram

implementation

Прокат велосипедов

*special problem, greedy, implementation

Exponential notation

implementation, strings

Bracket Sequence

data structures, expression parsing, implementation

Parallel Universes (Easy)

implementation

You Are Given a WASD-string...

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

Berland Bingo

implementation

Stack Sorting

constructive algorithms, data structures, greedy, implementation

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Sheikh (Hard Version)

binary search, bitmasks, brute force, greedy, implementation, two pointers

Pinball

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

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Mathematical Analysis Rocks!

constructive algorithms, implementation, math

Friends or Not

*special problem, greedy, implementation

Freedom of Choice

brute force, greedy, implementation

Polycarp and Snakes

brute force, implementation

Making Sequences is Fun

binary search, implementation, math

Learning to Paint

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

Fox and Minimal path

bitmasks, constructive algorithms, graphs, implementation, math

Grime Zoo

brute force, greedy, implementation, strings

Ivan and Powers of Two

greedy, implementation

Promocodes with Mistakes

*special problem, brute force, constructive algorithms, implementation

1-2-3

graphs, implementation

Weird Chess

brute force, constructive algorithms, implementation

QR code

*special problem, implementation

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Digits Sequence (Hard Edition)

binary search, divide and conquer, implementation

Ryouko's Memory Note

implementation, math, sortings

Monster Invaders

dp, greedy, implementation

Sum over all Substrings (Hard Version)

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

Memory Manager

implementation

Vasily the Bear and Sequence

brute force, greedy, implementation, number theory

Rain

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

Red-Black Number

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

Mars rover

dfs and similar, graphs, implementation, trees

Literature Lesson

implementation

Unstable String Sort

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

Robot Bicorn Attack

brute force, implementation

Pick Heroes

greedy, implementation, interactive, sortings

Mike and Frog

brute force, greedy, implementation, math

TV Shows

data structures, greedy, implementation, sortings

Candy Box (hard version)

greedy, implementation, sortings

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Treasure Hunting

binary search, dp, greedy, implementation

Space Harbour

data structures, implementation, math, sortings

Candy Party (Hard Version)

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

Heidi and the Turing Test (Easy)

implementation

Bitwise Formula

bitmasks, brute force, dfs and similar, expression parsing, implementation

Removing Leaves

data structures, greedy, implementation, trees

Bananas in a Microwave

dfs and similar, dp, graphs, implementation

Not Escaping

data structures, dp, implementation, shortest paths, two pointers

Statistics of Recompressing Videos

*special problem, data structures, implementation

Staircases

brute force, combinatorics, data structures, dfs and similar, dp, implementation, math

Copy of a Copy of a Copy

constructive algorithms, dfs and similar, graphs, implementation, sortings

Polo the Penguin and XOR operation

implementation, math

Lost in Transliteration

implementation

Grammar Lessons

implementation, strings

Count Seconds

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

Martian Clock

implementation

Young Table

implementation, sortings

Changing Array

greedy, implementation