Mushroom Strife

brute force, dfs and similar

Periodical Numbers

combinatorics, dp, number theory

New York Hotel

greedy, math

Conveyor

sortings, two pointers

More Reclamation

games

Writing a Song

brute force, dp, strings

Context Advertising

dp, two pointers

Mice

greedy, two pointers

The Wall (hard)

dp

Xenia and Dominoes

bitmasks, dfs and similar, dp

Dormitory

dp, implementation

Crosses

brute force, implementation

Piet

implementation

White, Black and White Again

combinatorics, number theory

Marmots (easy)

math

Optimizer

data structures, greedy, sortings

Exact Neighbours (Medium)

constructive algorithms

Game with Points

dp, graphs, implementation, shortest paths

Cowboys

combinatorics, dp, math

Property

greedy, sortings

Smart Boy

dp, games, strings

Zigzag

data structures

Segments

data structures

Arithmancy (Easy)

brute force, constructive algorithms, interactive, strings

Pixels

constructive algorithms, math

Amusement Park

*special problem, ternary search

Magic Squares

Significant Cups

*special problem, binary search, data structures, two pointers

Maximum Sum Subarrays

*special problem, dp

Road Problem

graphs

Neural Network Problem

*special problem, binary search, greedy

Levenshtein distance

*special problem

The Beaver's Problem - 3

Number Deletion Game

*special problem, dp, games, greedy

Maximal Difference

*special problem

Triskaidekaphobia

*special problem

Points in triangle

*special problem, geometry

Автобус

binary search, data structures, greedy, sortings

Game with Two Trees

Jumping frogs

*special problem

The Beaver's Problem - 3

The Beaver's Problem - 3

Battleship

*special problem, dfs and similar, implementation

Euclidean Distance

*special problem

Powerful array

data structures, implementation, math, two pointers

Circular RMQ

data structures

XOR and Favorite Number

data structures

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Gerald and Giant Chess

combinatorics, dp, math, number theory

Magic Numbers

dp

Clear the Multiset

data structures, divide and conquer, dp, greedy

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Multiples and Power Differences

constructive algorithms, graphs, math, number theory

Discrete Centrifugal Jumps

data structures, dp, graphs

The Bakery

binary search, data structures, divide and conquer, dp, two pointers

A Simple Task

bitmasks, dp, graphs

Great Vova Wall (Version 1)

greedy, implementation, math

Sequence

dp, sortings

Powerful Ksenia

bitmasks, constructive algorithms, math

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

Cleaning

data structures, dp, greedy, math

Magic Stones

constructive algorithms, math, sortings

Almost Difference

data structures, math

0-1-Tree

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

Duff in the Army

data structures, trees

Strange Housing

constructive algorithms, dfs and similar, graph matchings, graphs, greedy

Sum of Paths

combinatorics, dp, math

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

Palindrome Degree

hashing, strings

Non-Decreasing Dilemma

data structures, divide and conquer, math

To Go Or Not To Go?

brute force, dfs and similar, graphs, greedy, implementation, shortest paths

Game on Tree

implementation, math, probabilities, trees

GukiZ hates Boxes

binary search, greedy

Phoenix and Computers

combinatorics, dp, math

Three Sequences

constructive algorithms, data structures, greedy, math

Sausage Maximization

bitmasks, data structures, trees

Earn or Unlock

bitmasks, brute force, dp

Kaavi and Magic Spell

dp, strings

Make It Increasing

binary search, constructive algorithms, data structures, dp, implementation

Equal Tree Sums

constructive algorithms, dfs and similar, math, trees

Almost Acyclic Graph

dfs and similar, graphs

Jongmah

dp

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Travelling Salesman Problem

binary search, data structures, dp, greedy, shortest paths, sortings, two pointers

Calendar Ambiguity

math, number theory

Infinite Path

brute force, dfs and similar, graphs, math, number theory

Decreasing Heights

brute force, dp

Make k Equal

greedy

Salyg1n and Array (hard version)

constructive algorithms, interactive

Perfect Triples

bitmasks, brute force, constructive algorithms, divide and conquer, math

Reverse Card (Hard Version)

brute force, math, number theory

Kuroni and the Score Distribution

constructive algorithms, greedy, implementation, math

Marbles

bitmasks, dp

Guess the K-th Zero (Hard version)

binary search, constructive algorithms, data structures, interactive

Paint the Middle

dp, greedy, sortings, two pointers

Great Vova Wall (Version 2)

data structures, implementation

Paired Payment

binary search, brute force, constructive algorithms, dp, flows, graphs, shortest paths

Balanced String

dp

Telepanting

binary search, data structures, dp, sortings