New Year and Castle Construction

combinatorics, geometry, math, sortings

New Year and Conference

binary search, data structures, hashing, sortings

New Year and Ascent Sequence

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

Petya and Exam

greedy, sortings, two pointers

K for the Price of One (Hard Version)

dp, greedy, sortings

K for the Price of One (Easy Version)

dp, greedy, sortings

Three Friends

brute force, greedy, math, sortings

Portals

data structures, dp, greedy, implementation, sortings

Strange Device

constructive algorithms, interactive, math, sortings

Modulo Equality

brute force, sortings

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

A Game with Traps

binary search, dp, greedy, sortings

Yet Another Monster Killing Problem

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

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Equalizing Two Strings

constructive algorithms, sortings, strings

Yet Another Division Into Teams

dp, greedy, sortings

Antenna Coverage

data structures, dp, greedy, sortings

Harmonious Graph

constructive algorithms, dfs and similar, dsu, graphs, greedy, sortings

Sweets Eating

dp, greedy, math, sortings

Salary Changing

binary search, greedy, sortings

Too Many Segments (hard version)

data structures, greedy, sortings

Grow The Tree

greedy, math, sortings

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

0-1 MST

dfs and similar, dsu, graphs, sortings

Adilbek and the Watering System

data structures, greedy, sortings

Kill `Em All

greedy, sortings

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Balanced Tunnel

data structures, sortings, two pointers

Paint the Tree

dp, sortings, trees

Choose a Square

binary search, data structures, sortings

Cards

implementation, sortings, strings

Shooting

greedy, implementation, sortings

Employment

greedy, sortings

Petya and Construction Set

constructive algorithms, graphs, math, sortings, trees

Path Queries

divide and conquer, dsu, graphs, sortings, trees

Equalizing by Division (hard version)

brute force, math, sortings

Ice Cream

*special problem, greedy, sortings

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Choose Two Numbers

math, sortings

Boxers

greedy, sortings

Maximum Median

binary search, greedy, math, sortings

Matching vs Independent Set

constructive algorithms, graphs, greedy, sortings

Welfare State

binary search, brute force, data structures, sortings

MP3

sortings, two pointers

Culture Code

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

Array Splitting

greedy, sortings

DIY Wooden Ladder

greedy, math, sortings

K-th Path

brute force, constructive algorithms, shortest paths, sortings

Geometers Anonymous Club

data structures, geometry, math, sortings

Count The Rectangles

bitmasks, brute force, data structures, geometry, sortings

Tokitsukaze and Strange Rectangle

data structures, divide and conquer, sortings, two pointers

Number Circle

greedy, math, sortings

Subarray Sorting

data structures, sortings

Exam in BerSU (easy version)

greedy, sortings

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

The Doctor Meets Vader (Easy)

binary search, sortings

Candy Box (hard version)

greedy, implementation, sortings

Topforces Strikes Back

brute force, math, sortings

Candy Box (easy version)

greedy, sortings

A Story of One Country (Hard)

brute force, greedy, sortings

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Irrigation

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

Destroy it!

dp, implementation, sortings

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Array Splitting

greedy, sortings

Ehab Is an Odd Person

sortings

Ehab Fails to Be Thanos

constructive algorithms, greedy, sortings

Scalar Queries

combinatorics, data structures, math, sortings

A Tale of Two Lands

binary search, sortings, two pointers

Two Arrays and Sum of Functions

greedy, math, sortings

Polycarp Training

data structures, greedy, sortings

Permutation recovery

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

The Party and Sweets

binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers

Match Points

binary search, greedy, sortings, ternary search, two pointers

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Reverse a Substring

implementation, sortings, strings

Shovels Shop

dp, greedy, sortings

Two Teams

data structures, implementation, sortings

Stas and the Queue at the Buffet

greedy, math, sortings

Earth Wind and Fire

constructive algorithms, greedy, math, sortings, two pointers

Dirty Deeds Done Dirt Cheap

greedy, sortings

Crazy Diamond

constructive algorithms, sortings

Two Shuffled Sequences

constructive algorithms, sortings

Parity Alternated Deletions

greedy, implementation, sortings

Playlist

brute force, data structures, sortings

Skyscrapers

implementation, sortings

Nastya Is Transposing Matrices

constructive algorithms, sortings

K Balanced Teams

dp, sortings, two pointers

Balanced Team

sortings, two pointers

Discounts

greedy, sortings

Birthday

binary search, greedy, sortings

Morse Code

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

Technogoblet of Fire

implementation, sortings

Frets On Fire

binary search, sortings

Alyona and a Narrow Fridge

binary search, flows, greedy, sortings

Emotes

greedy, math, sortings

Yet Another Array Partitioning Task

constructive algorithms, greedy, sortings

Magic Stones

constructive algorithms, math, sortings

Tape

greedy, sortings