Compression and Expansion

brute force, data structures, greedy, implementation, trees

Color with Occurrences

brute force, data structures, dp, greedy, strings

Longest k-Good Segment

binary search, data structures, two pointers

Destroying Array

data structures, dsu

Divide and Summarize

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

Thor

brute force, data structures, implementation

Replacement

constructive algorithms, data structures, implementation

Planar Reflections

brute force, data structures, dp

Coffee Break

binary search, data structures, greedy, two pointers

Playlist

brute force, data structures, sortings

Welfare State

binary search, brute force, data structures, sortings

Hits Different

data structures, dp, implementation, math

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Queries for the Array

data structures, dfs and similar, implementation, strings, trees

Kolya and Movie Theatre

constructive algorithms, data structures, greedy

Binary String Copying

binary search, brute force, data structures, hashing, strings

Counting Rectangles

brute force, data structures, dp, implementation

Catch Overflow!

data structures, expression parsing, implementation

Sum and Product

binary search, data structures, math

Zero-Sum Prefixes

brute force, data structures, dp, greedy, implementation

Tracking Segments

binary search, brute force, data structures, two pointers

To Become Max

binary search, brute force, data structures, dp

MEX maximizing

data structures, greedy, implementation, math

Gardener and Tree

brute force, data structures, dfs and similar, greedy, implementation, trees

Least Prefix Sum

data structures, greedy

Alternating Current

data structures, greedy, implementation

Reading Books (easy version)

data structures, greedy, sortings

Distinct Characters Queries

data structures

Orac and LCM

data structures, math, number theory

Constructing the Array

constructive algorithms, data structures, sortings

Potions (Hard Version)

data structures, greedy

Good Subarrays

data structures, dp, math

Oh Sweet Beaverette

data structures, sortings

Summer Homework

brute force, data structures

Encrypting Messages

data structures

Workout plan

data structures, greedy

Sereja and Algorithm

data structures, implementation

Little Elephant and Cards

binary search, data structures

Misha and Forest

constructive algorithms, data structures, greedy, sortings, trees

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Queue

binary search, data structures

Okabe and Boxes

data structures, greedy, trees

Glass Carving

binary search, data structures, implementation

Dima and Staircase

data structures, implementation

Lunar New Year and Food Ordering

data structures, implementation

Cat Party (Easy Edition)

data structures, implementation

Bubble Sort Graph

binary search, data structures, dp

Minimize the error

data structures, greedy, sortings

Knowledge Cards

constructive algorithms, data structures

Maximum Absurdity

data structures, dp, implementation

Two TVs

data structures, greedy, sortings

Mentors

binary search, data structures, implementation

Balance (Easy version)

brute force, data structures, implementation, number theory

Marvolo Gaunt's Ring

brute force, data structures, dp

Hyperset

brute force, data structures, implementation

In Love

data structures, greedy

Maximum Crossings (Hard Version)

data structures, divide and conquer, sortings

Vlad and an Odd Ordering

binary search, bitmasks, data structures, dp, implementation, math, number theory

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Valeriy and Deque

data structures, implementation

Almost Increasing Subsequence

binary search, data structures, greedy

Fault-tolerant Network

brute force, data structures, implementation

13th Labour of Heracles

data structures, greedy, sortings, trees

The Morning Star

combinatorics, data structures, geometry, implementation, math, sortings

Powers of Two

brute force, data structures, implementation, math

Tea Tasting

binary search, data structures, implementation

Range Update Point Query

binary search, brute force, data structures

Greetings

data structures, divide and conquer, sortings

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Data Structures Fan

binary search, bitmasks, data structures, dp

Minimum Grid Path

brute force, data structures, greedy, math

Knight Tournament

data structures, dsu

Friends and Gifts

constructive algorithms, data structures, math

Integers Shop

data structures, greedy, implementation

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Diluc and Kaeya

data structures, dp, hashing, number theory

Air Conditioners

data structures, dp, implementation, shortest paths, sortings, two pointers

Lunar New Year and a Wander

data structures, dfs and similar, graphs, greedy, shortest paths

Yet Another Walking Robot

data structures, implementation

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Equalize the Array

binary search, data structures, greedy, math, sortings

Maximum width

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

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Potions (Easy Version)

brute force, data structures, dp, greedy

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

String Manipulation 1.0

*special problem, binary search, brute force, data structures, strings

Multithreading

data structures, greedy, implementation

Berpizza

data structures, implementation

Replace To Make Regular Bracket Sequence

data structures, expression parsing, math

Skier

data structures, implementation

You Are So Beautiful

data structures

Sonya and Queries

data structures, implementation

T-shirt buying

data structures, implementation

Cd and pwd commands

*special problem, data structures, implementation

Where is the Pizza?

data structures, dfs and similar, dsu, graphs, implementation, math

Rooks Defenders

data structures, implementation

Heavy Intervals

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

Candies!

data structures, dp, implementation, math

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

Array Game

binary search, brute force, data structures, sortings, two pointers