Cottage Village

implementation, sortings

Vasya and a Tree

data structures, trees

BerOS File Suggestion

brute force, implementation

Alarm Clock

greedy

Spoilt Permutation

implementation

Sea Battle

constructive algorithms, greedy, math

Even Path

data structures, implementation

Balls Game

brute force, two pointers

Race Against Time

implementation

Tree Construction

data structures, trees

Yet Another Sorting Problem

data structures, math

Moving Chips

bitmasks, dp, greedy

Watching Fireworks is Fun

data structures, dp, math

A Game with Traps

binary search, dp, greedy, sortings

Vasya And The Mushrooms

dp, implementation

Email address

expression parsing, implementation

A Leapfrog in the Array

constructive algorithms, math

Water Balance

data structures, geometry, greedy

Escape The Maze (hard version)

dfs and similar, dp, greedy, shortest paths, trees

Connected Component on a Chessboard

constructive algorithms, implementation

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

Unique Palindromes

constructive algorithms, math, strings

Divan and Kostomuksha (easy version)

dp, number theory

Equation

math

Chemical table

constructive algorithms, dfs and similar, dsu, graphs, matrices

Divisibility by 25

brute force, greedy

Fight the Monster

binary search, brute force, implementation

Range Sorting (Easy Version)

binary search, dp, dsu, greedy, trees, two pointers

Robot Queries

binary search, data structures, dp, implementation

How many trees?

combinatorics, divide and conquer, dp

Koxia and Game

constructive algorithms, data structures, dfs and similar, dsu, flows, games, graph matchings, graphs, implementation

Programming Competition

dfs and similar, dp, graph matchings, greedy, trees

2-3-numbers

implementation, math

Matchmaker

*special problem, greedy, sortings

Riverside Curio

data structures, dp, greedy

Compression

dp, implementation, math, number theory

Dima and Text Messages

brute force, strings

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Anton and Chess

implementation

The Union of k-Segments

greedy, sortings

Duff in the Army

data structures, trees

Tram

constructive algorithms, implementation, math

Fixed Points

binary search, brute force, dp

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Case of Fugitive

data structures, greedy, sortings

Matrix Walk

implementation

Alex and Julian

bitmasks, math, number theory

Trees in a Row

brute force, implementation

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Which floor?

brute force, implementation

Dasha and Nightmares

bitmasks, hashing, meet-in-the-middle, strings

GCD Guess

bitmasks, chinese remainder theorem, constructive algorithms, games, interactive, math, number theory

Almost Difference

data structures, math

Li Hua and Tree

brute force, data structures, dfs and similar, dp, implementation, trees

All Possible Digits

binary search, data structures, greedy, math, number theory

Small GCD

bitmasks, brute force, dp, math, number theory

Hongcow Solves A Puzzle

implementation

Homework

greedy

Tavas and Karafs

binary search, greedy, math

Suspicious logarithms

binary search, brute force, math

A Mist of Florescence

constructive algorithms, graphs

Concatenated Multiples

implementation, math

Vasilije Loves Number Theory

brute force, math, number theory

Polycarp's phone book

data structures, implementation, sortings

Shaass and Lights

combinatorics, number theory

Median on Segments (Permutations Edition)

sortings

Posterized

games, greedy

Segment Tree

data structures, dsu, graphs, trees

Moving Dots

binary search, brute force, combinatorics, math, two pointers

Repetitions Decoding

constructive algorithms, implementation, sortings

Easy Scheduling

implementation, math

Playlist

data structures, dsu, implementation, shortest paths

Little Artem and Matrix

implementation

Anton and Tree

dfs and similar, dp, trees

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Same Sum Blocks (Easy)

greedy

Chord

brute force, implementation

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Report

data structures, sortings

Ancient Prophesy

brute force, implementation, strings

Collapsing Strings

data structures, strings, trees

Nastya Is Buying Lunch

greedy

Renting Bikes

binary search, greedy

Cubical Planet

math

Beingawesomeism

implementation, math

Home Numbers

*special problem, constructive algorithms, math

Permutations

brute force, combinatorics, implementation

Graph And Its Complement

constructive algorithms, graphs, implementation

ZgukistringZ

brute force, constructive algorithms, implementation, strings

Sereja and Mirroring

implementation

Rarity and New Dress

dfs and similar, dp, implementation, shortest paths

Toy Train (Simplified)

brute force, greedy

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Connecting Universities

dfs and similar, dp, graphs, trees

Robot Factory

bitmasks, dfs and similar

Kay and Snowflake

data structures, dfs and similar, dp, trees

Porcelain

dp

Hard Work

strings

The Golden Age

brute force, math