Compressed Bracket Sequence

brute force, implementation

Palindromic Matrix

constructive algorithms, implementation

Black Square

implementation

Rock-paper-scissors

implementation, schedules

Mishka and trip

implementation, math

Phone Numbers

constructive algorithms, implementation, strings

Pōja Verdon

*special problem, implementation, math

Was it Rated?

*special problem, *special problem, *special problem, brute force, implementation

Karen and Game

brute force, greedy, implementation

Year of University Entrance

*special problem, implementation, sortings

Makes And The Product

combinatorics, implementation, math, sortings

Not Afraid

greedy, implementation, math

Ela and Crickets

constructive algorithms, games, implementation, math

Masha and Bears

brute force, implementation

Sorting by Subsequences

dfs and similar, dsu, implementation, math, sortings

Difference Array

brute force, data structures, implementation, sortings

Center Alignment

implementation, strings

Perform Easily

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

Knights of a Polygonal Table

greedy, implementation, sortings

Cubes for Masha

brute force, implementation

Ilya and Matrix

constructive algorithms, greedy, implementation, sortings

Point on Spiral

brute force, geometry, implementation

Busy Robot

implementation

Max GEQ Sum

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

Digits Sequence (Easy Edition)

implementation

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Pyramid of Glasses

implementation, math, math

Did you mean...

dp, greedy, implementation

Petya and Catacombs

dsu, greedy, implementation, trees

Connect Three

implementation, math

Guest From the Past

implementation, math

Cyclic Operations

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

Vessels

data structures, dsu, implementation, trees

Weather

dp, implementation

Banh-mi

greedy, implementation, math

Boxes Packing

binary search, implementation

Voting for Photos

*special problem, constructive algorithms, implementation

Rating Compression

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

Minimum Diameter Tree

constructive algorithms, implementation, trees

King's Task

brute force, graphs, implementation

Santa Claus and Keyboard Check

implementation, strings

Escape

implementation, math

Berserk Monsters

brute force, data structures, dsu, implementation, math

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Chessboard

bitmasks, brute force, implementation

Seating On Bus

implementation

Finding Team Member

brute force, implementation, sortings

Running Student

brute force, geometry, implementation

Mike and Cellphone

brute force, constructive algorithms, implementation

Need for Pink Slips

bitmasks, brute force, dfs and similar, implementation, math, probabilities

Trains

implementation, math

African Crossword

implementation, strings

Little Xor

brute force, implementation

Useful Decomposition

implementation, trees

Cut and Paste

implementation, math

Phone Numbers

implementation, strings

Sorting the Coins

dsu, implementation, sortings, two pointers

Internet Address

implementation, strings

Ksusha the Squirrel

brute force, implementation

Array Repetition

binary search, brute force, dsu, implementation, math

After Training

data structures, implementation, math

Laurenty and Shop

implementation

Semifinals

implementation, sortings

Food on the Plane

implementation, math

Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

Meeting

implementation

The Contest

implementation

Primes or Palindromes?

brute force, implementation, math, number theory

Feeding Chicken

constructive algorithms, greedy, implementation

Complete Tripartite

brute force, constructive algorithms, graphs, hashing, implementation

The Robot

brute force, implementation

Ksyusha and Chinchilla

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

Very Suspicious

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

Maximum Submatrix 2

data structures, dp, implementation, sortings

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

Luba And The Ticket

brute force, greedy, implementation

505

bitmasks, brute force, constructive algorithms, dp, greedy, implementation

Room Leader

implementation

Tiling with Hexagons

implementation, math

Help Kingdom of Far Far Away 2

implementation, strings

Cloud of Hashtags

binary search, greedy, implementation, strings

Extract Numbers

implementation, strings

Mystical Mosaic

greedy, implementation

Alice and Hairdresser

dsu, implementation

Desktop Rearrangement

data structures, greedy, implementation

Code Parsing

implementation

Magical Array

constructive algorithms, hashing, implementation, math

Whose sentence is it?

implementation, strings

Autocomplete

implementation

Video Posts

implementation

Irrational problem

implementation, number theory

Maximum Subrectangle

binary search, implementation, two pointers

Watering Flowers

implementation

Remainder Problem

brute force, data structures, implementation

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Triangle

brute force, geometry, implementation, math

Find Maximum

implementation, math, number theory

Music

implementation, math

Not simply beatiful strings

implementation

Nauuo and Cards

greedy, implementation