Little Elephant and Array

constructive algorithms, data structures

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

Game of Credit Cards

data structures, dp, greedy, sortings

Program

data structures, dp, implementation, strings

Integers Have Friends

binary search, data structures, divide and conquer, math, number theory, two pointers

Welfare State

binary search, brute force, data structures, sortings

Vasiliy's Multiset

binary search, bitmasks, data structures, trees

Geometric Progression

binary search, data structures, dp

Coffee Break

binary search, data structures, greedy, two pointers

Playlist

brute force, data structures, sortings

Beautiful Triple Pairs

combinatorics, data structures

Planar Reflections

brute force, data structures, dp

Hyperset

brute force, data structures, implementation

Replacement

constructive algorithms, data structures, implementation

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Thor

brute force, data structures, implementation

Divide and Summarize

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

Cd and pwd commands

*special problem, data structures, implementation

Destroying Array

data structures, dsu

Longest k-Good Segment

binary search, data structures, two pointers

Color with Occurrences

brute force, data structures, dp, greedy, strings

MEX and Increments

constructive algorithms, data structures, dp, greedy, implementation, math, sortings

Photo to Remember

*special problem, data structures, dp, implementation

String Deletion

binary search, data structures, greedy, two pointers

Compression and Expansion

brute force, data structures, greedy, implementation, trees

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

The Festive Evening

data structures, implementation

XOR on Segment

bitmasks, data structures

Training Session

combinatorics, data structures, geometry, implementation, math

T-shirt buying

data structures, implementation

Multiplicity

data structures, dp, implementation, math, number theory

Marvolo Gaunt's Ring

brute force, data structures, dp

Monoblock

combinatorics, data structures, implementation, math

Sonya and Queries

data structures, implementation

Mind Control

brute force, data structures, implementation

Balance (Easy version)

brute force, data structures, implementation, number theory

You Are So Beautiful

data structures

Multiset

binary search, data structures

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Mike and Feet

binary search, data structures, dp, dsu

Circular RMQ

data structures

Skier

data structures, implementation

Bus of Characters

data structures, greedy, implementation

Minimum Array

binary search, data structures, greedy

Tokitsukaze and Strange Inequality

brute force, data structures, dp

Rorororobot

binary search, data structures, greedy, math

Mentors

binary search, data structures, implementation

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Two TVs

data structures, greedy, sortings

The Child and Sequence

data structures, math

XOR and Favorite Number

data structures

Maximum Absurdity

data structures, dp, implementation

Replace the Numbers

constructive algorithms, data structures, dsu, implementation

Recursive Queries

binary search, data structures, dfs and similar

Ant colony

data structures, math, number theory

Correct Placement

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

Pekora and Trampoline

brute force, data structures, dp, greedy, implementation

Knowledge Cards

constructive algorithms, data structures

Seating Arrangements (hard version)

data structures, greedy, implementation, sortings, two pointers

Replace To Make Regular Bracket Sequence

data structures, expression parsing, math

Xenia and Tree

data structures, divide and conquer, trees

Reverse Madness

data structures, greedy

Berry Jam

data structures, dp, greedy, implementation

Character Blocking

data structures, hashing, implementation

Boris and His Amazing Haircut

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

Playoff Tournament

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

Berpizza

data structures, implementation

Minimize the error

data structures, greedy, sortings

Rating System

binary search, brute force, data structures, dp, dsu, greedy, math, two pointers

Rescue Nibel!

combinatorics, data structures, sortings

New Reform

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

Heap Operations

constructive algorithms, data structures, greedy

Yet Another Monster Killing Problem

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

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

Producing Snow

binary search, data structures

Path Prefixes

binary search, data structures, dfs and similar, trees

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Gambling

data structures, dp, greedy, math

Cat Party (Hard Edition)

data structures, implementation

Bubble Sort Graph

binary search, data structures, dp

Cross Coloring

data structures, implementation, math

Minimum spanning tree for each edge

data structures, dfs and similar, dsu, graphs, trees

Cat Party (Easy Edition)

data structures, implementation

Omkar and Determination

data structures, dp

Valiant's New Map

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

Max Median

binary search, data structures, dp

Painting the Array I

constructive algorithms, data structures, dp, greedy, implementation

Array Division

binary search, data structures, implementation

Order Book

data structures, greedy, implementation, sortings

Fools and Roads

data structures, dfs and similar, trees

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Beautiful Array

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

The Treasure of The Segments

binary search, data structures, greedy

Average Sleep Time

data structures, implementation, math

Dima and Staircase

data structures, implementation

Lunar New Year and Food Ordering

data structures, implementation

Vasya and Basketball

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

Merge Equals

data structures, implementation