Queue in the Train

data structures, greedy, implementation

Alice and the Unfair Game

binary search, data structures, dp, dsu

Alice and the Doll

binary search, brute force, data structures, greedy, implementation

Balanced Playlist

binary search, data structures, implementation

Balanced Tunnel

data structures, sortings, two pointers

Adilbek and the Watering System

data structures, greedy, sortings

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Distinct Characters Queries

data structures

Social Network (hard version)

data structures, implementation

Wi-Fi

data structures, dp, greedy

Choose a Square

binary search, data structures, sortings

Gardener Alex

binary search, data structures

Workout plan

data structures, greedy

Guarding warehouses

data structures, geometry

Moving Walkways

data structures, greedy, math

Into Blocks (hard version)

data structures

Into Blocks (easy version)

data structures, dsu, greedy, implementation, two pointers

Koala and Notebook

data structures, dfs and similar, graphs, shortest paths, strings, trees

Forced Online Queries Problem

data structures, divide and conquer, dsu, graphs, trees

Sum Queries?

data structures, greedy, implementation, math

Feeling Good

bitmasks, data structures

Bad Sequence

data structures, greedy

Unstable String Sort

data structures, dfs and similar, dsu, graphs, greedy, implementation, strings

Bad Prices

data structures, implementation

Red Blue Tree

data structures, implementation, trees

Let Them Slide

data structures, implementation

Restore Permutation

binary search, data structures, greedy, implementation

Indie Album

data structures, dfs and similar, hashing, string suffix structures, strings, trees

Remainder Problem

brute force, data structures, implementation

Kirk and a Binary String (hard version)

data structures, greedy, math, strings

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

White Lines

brute force, data structures, dp, implementation, two pointers

Hotelier

brute force, data structures, implementation

You Are Given a WASD-string...

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

Welfare State

binary search, brute force, data structures, sortings

Magic Tree

*special problem, data structures, dp, trees

Dynamic Diameter

*special problem, data structures, dfs and similar, divide and conquer, trees

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

Geometers Anonymous Club

data structures, geometry, math, sortings

OpenStreetMap

data structures, two pointers

The Awesomest Vertex

data structures, dfs and similar

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Heidi and the Turing Test (Medium)

data structures

Candies!

data structures, dp, implementation, math

Subarray Sorting

data structures, sortings

Fedor Runs for President

data structures, dp, trees

Serge and Dining Room

binary search, data structures, graph matchings, greedy, implementation, math, trees

Valeriy and Deque

data structures, implementation

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Irrigation

binary search, data structures, implementation, sortings, trees, two pointers

Maximum Sine

binary search, data structures, number theory

Beautiful Lyrics

data structures, greedy, strings

Nauuo and Bug

data structures

Nauuo and ODT

data structures

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

The Number of Subpermutations

brute force, data structures, divide and conquer, hashing, math

Minimal Segment Cover

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

Catch Overflow!

data structures, expression parsing, implementation

Holy Diver

data structures

Decoding of Integer Sequences

*special problem, data structures, implementation

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Scalar Queries

combinatorics, data structures, math, sortings

Range Deleting

binary search, combinatorics, data structures, two pointers

Polycarp Training

data structures, greedy, sortings

Permutation recovery

constructive algorithms, data structures, dfs and similar, graphs, greedy, math, sortings

Cat Party (Easy Edition)

data structures, implementation

Indecisive Taxi Fee

data structures, graphs, shortest paths

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Cat Party (Hard Edition)

data structures, implementation

Special Segments of Permutation

data structures, divide and conquer, dsu, two pointers

Tree Generator™

data structures, implementation, trees

Minimum Array

binary search, data structures, greedy

Beautiful Array

brute force, data structures, divide and conquer, dp, greedy

Hot is Cold

bitmasks, data structures, divide and conquer, implementation

Number of Components

combinatorics, data structures, dp, math

Two Teams

data structures, implementation, sortings

Niyaz and Small Degrees

data structures, dp, trees

Lynyrd Skynyrd

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

Double Tree

data structures, divide and conquer, shortest paths, trees

Extending Set of Points

data structures, divide and conquer, dsu

Playlist

brute force, data structures, sortings

Dish Shopping

data structures, divide and conquer

Same Sum Blocks (Hard)

data structures, greedy

Nastya Hasn't Written a Legend

binary search, data structures

Matches Are Not a Child's Play

data structures, trees

Train Car Selection

data structures, greedy

Greedy Subsequences

data structures, dp, trees

Secret Letters

data structures, dp, greedy

Isolation

data structures, dp

Morse Code

binary search, data structures, dp, hashing, sortings, string suffix structures, strings

Most Dangerous Shark

data structures, dp, two pointers

Recursive Queries

data structures

Sasha and Algorithm of Silence's Sounds

data structures, trees

Sasha and a Very Easy Test

data structures, number theory

Sasha and a Patient Friend

binary search, data structures, implementation

Please, another Queries on Array?

bitmasks, data structures, divide and conquer, math, number theory