Dima and Text Messages

brute force, strings

Which floor?

brute force, implementation

Dynasty Puzzles

dp

Sereja and Swaps

brute force, sortings

Error Correct System

greedy

Anagram Search

implementation, strings

Curiosity Has No Limits

Two Seals

brute force, implementation

Happy Birthday

math

Kolya and Tandem Repeat

brute force, implementation, strings

Batch Sort

brute force, greedy, implementation, math

Xenia and Spies

brute force, greedy, implementation

Masha and two friends

implementation

Divide The Students

binary search, greedy, math

Bargaining Table

brute force, dp

DNA Alignment

math, strings

Sysadmin Bob

greedy, implementation, strings

Bear and Colors

implementation

Curriculum Vitae

brute force, implementation

Candies Distribution

constructive algorithms, implementation

Palindrome pairs

*special problem, brute force, dp, strings

Sereja and Algorithm

data structures, implementation

Spongebob and Joke

implementation

Keyboard

implementation

Farewell Party

constructive algorithms, implementation

Number Reduction

greedy

Hierarchy

dfs and similar, dsu, greedy, shortest paths

Qualification Rounds

bitmasks, brute force, constructive algorithms, dp

Purification

constructive algorithms, greedy

Bertown Subway

dfs and similar, greedy, math

Almost Arithmetical Progression

brute force, dp

Do you want a date?

implementation, math, sortings

Checkpoints

greedy, implementation, sortings

Music

implementation, math

Green and Black Tea

constructive algorithms, greedy, math

Magic Odd Square

constructive algorithms, math

Little Elephant and Cards

binary search, data structures

Hashing Trees

constructive algorithms, trees

Indivisibility

math, number theory

Sorting the Coins

dsu, implementation, sortings, two pointers

Controllers

binary search, math

Hide and Seek

graphs

Trains

implementation, math

Pie Rules

dp, games

Division into Teams

greedy, math, sortings

Escape

implementation, math

Santa Claus and Keyboard Check

implementation, strings

Torus Path

greedy, math

Vasya and Robot

brute force, greedy, math

Did you mean...

dp, greedy, implementation

Pyramid of Glasses

implementation, math, math

Misha and Forest

constructive algorithms, data structures, greedy, sortings, trees

Little Elephant and Interval

binary search, combinatorics, dp

Choosing Symbol Pairs

strings

Makes And The Product

combinatorics, implementation, math, sortings

Ela and Crickets

constructive algorithms, games, implementation, math

Liebig's Barrels

greedy

Garage

binary search, geometry, math

Light It Up

greedy

Phone Numbers

constructive algorithms, implementation, strings

Mahmoud and Ehab and the wrong algorithm

constructive algorithms, trees

Searching for Graph

brute force, constructive algorithms, graphs

Triangle

brute force, geometry

Planning

greedy

Bracket Sequences Concatenation Problem

implementation

Secret Combination

brute force, constructive algorithms, implementation

Bus

greedy, implementation, math

Dasha and Password

brute force, dp, implementation

Queue

dsu, implementation

Voting

greedy, implementation, two pointers

Make a Permutation!

greedy, implementation, math

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Frodo and pillows

binary search, greedy

Biridian Forest

dfs and similar, shortest paths

Coach

brute force, dfs and similar, graphs

Treasure

greedy

Mashmokh and Tokens

binary search, greedy, implementation, math

Bicycle Race

geometry, implementation, math

Photo of The Sky

brute force, implementation, math, sortings

Split a Number

greedy, implementation, strings

Fire Again

brute force, dfs and similar, shortest paths

Nested Segments

greedy, implementation, sortings

Vanya and Label

bitmasks, combinatorics, implementation, strings

Load Balancing

implementation, math

Median

greedy, math, sortings

Pearls in a Row

greedy

Hamming Distance Sum

combinatorics, strings

Case of Matryoshkas

implementation

Queue

binary search, data structures

Ramesses and Corner Inversion

constructive algorithms, greedy, implementation, math

Okabe and Boxes

data structures, greedy, trees

Bear and Different Names

constructive algorithms, greedy

Glass Carving

binary search, data structures, implementation

New Year and Curling

brute force, geometry, implementation, math

Dima and Staircase

data structures, implementation

Lunar New Year and Food Ordering

data structures, implementation

The Party and Sweets

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

Peculiar apple-tree

dfs and similar, graphs, trees

Smallest Word

constructive algorithms, greedy, implementation

Bicolored RBS

constructive algorithms, greedy