Robot Collisions

data structures, greedy, implementation, sortings

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Game of Life

implementation

Nastia Plays with a Tree

constructive algorithms, data structures, dfs and similar, dp, dsu, greedy, implementation, trees

To Go Or Not To Go?

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

Do Not Be Distracted!

brute force, implementation

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Group Photo

binary search, data structures, implementation, two pointers

Fillomino 2

constructive algorithms, dfs and similar, greedy, implementation

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Array and Peaks

constructive algorithms, implementation

Education

brute force, dp, greedy, implementation

A-B Palindrome

constructive algorithms, implementation, strings

Almost Rectangle

implementation

Spy Detected!

brute force, implementation

Yet Another Card Deck

brute force, data structures, implementation, trees

King's Task

brute force, graphs, implementation

Almost Sorted

binary search, combinatorics, constructive algorithms, implementation

Binary Literature

constructive algorithms, greedy, implementation, strings, two pointers

Restoring the Permutation

constructive algorithms, implementation

Double-ended Strings

brute force, implementation, strings

Partial Replacement

greedy, implementation

Encoded message

*special problem, implementation

Cakewalk

*special problem, greedy, implementation, shortest paths

Fibonacci Words

*special problem, implementation

DMCA

*special problem, implementation, number theory

Is it rated - 2

*special problem, implementation, interactive

Flip the Bits

constructive algorithms, greedy, implementation, math

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Napoleon Cake

dp, implementation, sortings

Alexey and Train

implementation

Going Home

brute force, hashing, implementation, math

Binary Removals

brute force, dp, greedy, implementation

Bananas in a Microwave

dfs and similar, dp, graphs, implementation

Qingshan and Daniel

brute force, data structures, greedy, implementation

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

1D Sokoban

binary search, dp, greedy, implementation, two pointers

Berland Crossword

bitmasks, brute force, greedy, implementation

ABC String

bitmasks, brute force, implementation

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Planet Lapituletti

brute force, implementation

Almost Fault-Tolerant Database

brute force, constructive algorithms, dfs and similar, greedy, implementation

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

K-th Largest Value

brute force, greedy, implementation

Permutation Transformation

dfs and similar, divide and conquer, implementation

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Minimum Ties

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation, math

Arena

implementation, sortings

Shifting Stacks

greedy, implementation

Replace and Keep Sorted

dp, implementation, math

Playlist

data structures, dsu, implementation, shortest paths

Basic Diplomacy

brute force, constructive algorithms, greedy, implementation

Restore Modulo

implementation, math

AB Graph

brute force, constructive algorithms, graphs, greedy, implementation

New Colony

brute force, greedy, implementation

The Great Hero

greedy, implementation, sortings

Painting the Array II

constructive algorithms, data structures, dp, greedy, implementation

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Nezzar and Symmetric Array

implementation, math, sortings

Journey

dfs and similar, dp, dsu, implementation

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Program

data structures, dp, implementation, strings

Replacing Elements

greedy, implementation, math, sortings

Strange List

brute force, greedy, implementation, math

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Building a Fence

dp, greedy, implementation, two pointers

Waste Sorting

greedy, implementation

Similar Sets

data structures, graphs, implementation

The Robot

brute force, implementation

Plane Tiling

geometry, implementation, math

Berpizza

data structures, implementation

Hills And Valleys

brute force, implementation

Plan of Lectures

constructive algorithms, dfs and similar, dsu, graphs, implementation, sortings, trees

Busy Robot

implementation

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

Last Year's Substring

dp, implementation, strings

Favorite Sequence

implementation, two pointers

Water Level

brute force, graphs, greedy, implementation, math

Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Find the Spruce

brute force, dp, implementation

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Sequence Transformation

greedy, implementation

Unique Bid Auction

implementation

Triangles

greedy, implementation

Suffix Operations

constructive algorithms, implementation

Cancel the Trains

implementation

String Equality

dp, greedy, hashing, implementation, strings

Non-Substring Subsequence

dp, greedy, implementation, strings

Multithreading (Hard Version)

combinatorics, implementation, math

Rating Compression

binary search, data structures, greedy, implementation, two pointers

Identify the Operations

combinatorics, data structures, dsu, greedy, implementation

Buy the String

implementation, math

Greedy Shopping

binary search, data structures, divide and conquer, greedy, implementation

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

Binary Table (Easy Version)

constructive algorithms, implementation

Specific Tastes of Andre

constructive algorithms, implementation

Make It Increasing

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

Yet Another Bookshelf

greedy, implementation

Boring Apartments

implementation, math

Black Friday

*special problem, implementation