Fox and Card Game

games, greedy, sortings

Intercity Travelling

combinatorics, math, probabilities

Vasya and Beautiful Arrays

brute force, dp, number theory

Minimax

constructive algorithms, greedy, strings

Send Boxes to Alice (Hard Version)

constructive algorithms, greedy, math, number theory, ternary search, two pointers

Vitya and Strange Lesson

binary search, data structures

Famil Door and Brackets

dp, strings

Array Queries

brute force, data structures, dp

Dima and Bacteria

dsu, graphs, shortest paths

Timofey and rectangles

constructive algorithms, geometry

Number of Components

combinatorics, data structures, dp, math

Bottom-Tier Reversals

constructive algorithms, greedy

OpenStreetMap

data structures, two pointers

Let's Play Osu!

dp, math, probabilities

Sergey and Subway

dfs and similar, dp, trees

Looking for Order

bitmasks, dp

Counting Arrays

combinatorics, dp, math, number theory

Little Artem and Time Machine

data structures

Bear and Tree Jumps

dfs and similar, dp, trees

Obsessive String

dp, strings

Choosing Balls

dp

The LCMs Must be Large

bitmasks, brute force, constructive algorithms, math, number theory

Longest Subsequence

brute force, math, number theory

Thanos Nim

games

Pillars

binary search, data structures, dp, sortings, trees

PolandBall and Polygon

data structures

New Year and Ancient Prophecy

dp, hashing, strings

Pchelyonok and Segments

binary search, data structures, dp, greedy, math

Ehab and another another xor problem

bitmasks, constructive algorithms, implementation, interactive

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Points on Plane

constructive algorithms, divide and conquer, geometry, greedy, sortings

Increase Sequence

combinatorics, dp

Funny Substrings

data structures, hashing, implementation, matrices, strings

Unusual Sequences

bitmasks, combinatorics, dp, math, number theory

We Need More Bosses

dfs and similar, graphs, trees

Levko and Array

binary search, dp

Leaving Auction

binary search, data structures

Breaking Good

dfs and similar, dp, graphs, shortest paths

Polycarp and Snakes

brute force, implementation

Beautiful Mirrors

data structures, dp, math, probabilities

Watching Fireworks is Fun

data structures, dp, math

Destruction of a Tree

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

Editor

data structures, implementation

Special Permutations

math

Friends and Subsequences

binary search, data structures

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Berland Beauty

constructive algorithms, dfs and similar, greedy, sortings, trees

Skyline Photo

data structures, divide and conquer, dp

Fibonacci-ish

brute force, dp, hashing, implementation, math

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Minimization

dp, greedy, sortings

Queue

constructive algorithms, dp

Paint the Tree

dp, sortings, trees

Wet Shark and Blocks

dp, matrices

Games with Rectangle

combinatorics, dp

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Arena

combinatorics, dp, math

Om Nom and Candies

brute force, greedy, math

Maxim and Array

constructive algorithms, data structures, greedy, math

Game of Stones

bitmasks, dp, games

Grime Zoo

brute force, greedy, implementation, strings

Shovels Shop

dp, greedy, sortings

Stack Sorting

constructive algorithms, data structures, greedy, implementation

Multicolored Markers

binary search, brute force, math, number theory

Running Track

dp, greedy, strings, trees

Mars rover

dfs and similar, graphs, implementation, trees

Domino (hard version)

constructive algorithms, implementation, math

Turn Off The TV

data structures, sortings

The World Is Just a Programming Task (Easy Version)

brute force, dp, greedy, implementation

Jeremy Bearimy

dfs and similar, graphs, greedy, trees

Portals

data structures, dp, greedy, implementation, sortings

TV Shows

data structures, greedy, implementation, sortings

Segments Removal

data structures, dsu, flows, implementation, two pointers

The Queue

brute force, greedy

Underground Lab

constructive algorithms, dfs and similar, graphs

Colorings and Dominoes

combinatorics, dp, greedy, math

Pathwalks

data structures, dp, graphs

Petr#

brute force, data structures, hashing, strings

Cycle

dfs and similar, graphs

How Many Paths?

dfs and similar, dp, graphs, trees

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Misha and Permutations Summation

data structures

Tree with Small Distances

dp, graphs, greedy

Sad powers

binary search, math, number theory

Weird journey

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

Divisors

interactive, math, number theory

Lynyrd Skynyrd

data structures, dfs and similar, dp, math, trees

Coprime Subsequences

bitmasks, combinatorics, number theory

Gadgets for dollars and pounds

binary search, greedy, two pointers

Tree Constructing

constructive algorithms, graphs

Berzerk

dfs and similar, dp, games

Two strings

binary search, hashing, strings, two pointers

Yaroslav and Time

binary search, graphs, shortest paths

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Treelabeling

bitmasks, constructive algorithms, dfs and similar, games, greedy, implementation, trees

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Iahub and Permutations

combinatorics, math

Greedy Arkady

math

Range Deleting

binary search, combinatorics, data structures, two pointers

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings