Optimal Partition

data structures, dp

Magical Boxes

greedy, math

Kirill and Mushrooms

data structures, sortings

Shopping

brute force

Railway System

constructive algorithms, graphs, greedy, interactive, sortings

MADMAX

dfs and similar, dp, games, graphs

Multitasking

greedy, implementation, sortings, two pointers

To Go Or Not To Go?

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

Tell Your World

brute force, geometry

Phillip and Trains

dfs and similar, graphs, shortest paths

Quadcopter Competition

greedy, math

Easy As ABC

brute force

Tree Diameter

bitmasks, graphs, interactive

Salyg1n and Array (simple version)

constructive algorithms, interactive, math

Problems for Round

greedy, implementation

Non-Decreasing Dilemma

data structures, divide and conquer, math

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Palindrome Degree

hashing, strings

Connected Component on a Chessboard

constructive algorithms, implementation

Errich-Tac-Toe (Hard Version)

constructive algorithms, math

One Occurrence

data structures, divide and conquer

Spiders

dp, greedy, trees

Prime Permutation

implementation, number theory, strings

DZY Loves Modification

brute force, data structures, greedy

Guess the Permutation

binary search, combinatorics, interactive, math

Clique in the Divisibility Graph

dp, math, number theory

PFAST Inc.

bitmasks, brute force, graphs

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Down the Hatch!

implementation

Where Are My Flakes?

implementation, two pointers

T-Shirt Hunt

brute force, implementation

T-shirts from Sponsor

implementation

Weight the Tree

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

MUH and House of Cards

binary search, brute force, greedy, math

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

Petya and Divisors

binary search, data structures, number theory

Sum of Paths

combinatorics, dp, math

Portal

brute force, data structures, dp, greedy, implementation

Eight Point Sets

sortings

Maximum Diameter Graph

constructive algorithms, graphs, implementation

Ciel and Robot

binary search, implementation, math

Punctuation

implementation, strings

Height All the Same

combinatorics, constructive algorithms, math, matrices

Da Vinci Powers

*special problem

Magic, Wizardry and Wonders

constructive algorithms, greedy

Social Circles

greedy, math

Cottage Village

implementation, sortings

Unlucky Numbers

brute force, dp, greedy, implementation

Alena And The Heater

binary search, implementation

Coloring Brackets

dp

Debate

greedy

Fountains

binary search, data structures, implementation

Tree Construction

data structures, trees

Brain Network (medium)

dfs and similar, graphs, trees

Strange Housing

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

Permutations

brute force

Winnie-the-Pooh and honey

implementation, math

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Parity Game

constructive algorithms

A Game with Traps

binary search, dp, greedy, sortings

Full Turn

geometry, hashing, number theory

Travelling Salesman and Special Numbers

brute force, combinatorics, dp

Professor Higashikata

data structures, dsu, greedy, implementation, strings

Beautiful numbers

dp, number theory

Misha, Grisha and Underground

dfs and similar, graphs, trees

N Problems During K Days

constructive algorithms, greedy, math

Cow Program

dfs and similar, dp, graphs

Vasya and a Tree

data structures, trees

BerOS File Suggestion

brute force, implementation

Sea Battle

constructive algorithms, greedy, math

Alarm Clock

greedy

Spoilt Permutation

implementation

Even Path

data structures, implementation

Watching Fireworks is Fun

data structures, dp, math

Moving Chips

bitmasks, dp, greedy

Balls Game

brute force, two pointers

Yet Another Sorting Problem

data structures, math

Race Against Time

implementation

Escape The Maze (hard version)

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

Challenges in school №41

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

Email address

expression parsing, implementation

Vasya And The Mushrooms

dp, implementation

Robot Queries

binary search, data structures, dp, implementation

Divisibility by 25

brute force, greedy

Equation

math

Unique Palindromes

constructive algorithms, math, strings

Water Balance

data structures, geometry, greedy

0-1-Tree

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

Jeopardy of Dropped Balls

binary search, brute force, dsu, implementation

A Leapfrog in the Array

constructive algorithms, math

Programming Competition

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

Range Sorting (Easy Version)

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

Divan and Kostomuksha (easy version)

dp, number theory

Chemical table

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

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

A Mist of Florescence

constructive algorithms, graphs

Fight the Monster

binary search, brute force, implementation

How many trees?

combinatorics, divide and conquer, dp