Hessenberg matrix

*special problem

Creeper

*special problem

TIE fighter

*special problem

X-wing fighter

*special problem

Pattern of increasing blocks

*special problem

Block diagonal matrix

*special problem

``Is the number of ones divisible by 3?'' oracle

*special problem

``Is the bit string periodic?'' oracle

*special problem

Alternating bits oracle

*special problem

Not A, not B or not C?

*special problem

Distinguish three-qubit states

*special problem

Generate equal superposition of four basis states

*special problem

Generate state |00⟩ + |01⟩ + |10⟩

*special problem

Block unitary

*special problem

Chessboard unitary

*special problem

Anti-diagonal unitary

*special problem

Palindrome checker oracle

*special problem

OR oracle

*special problem

AND oracle

*special problem

Please, another Queries on Array?

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

Arithmetic Progression

binary search, interactive, number theory, probabilities

Flood Fill

dp

Trailing Loves (or L'oeufs?)

brute force, implementation, math, number theory

Yet Another Array Partitioning Task

constructive algorithms, greedy, sortings

Got Any Grapes?

brute force, greedy, implementation

Sasha and Magnetic Machines

greedy, number theory

Sasha and His Trip

dp, greedy, math

Tree

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

Destroy the Colony

combinatorics, dp, math

Creative Snap

binary search, brute force, divide and conquer, math

Average Superhero Gang Power

brute force, implementation, math

Superhero Transformation

implementation, strings

Modest Substrings

dp, strings

Tree-Tac-Toe

constructive algorithms, games, trees

Nearest Leaf

data structures, trees

Magic Stones

constructive algorithms, math, sortings

Jongmah

dp

Meaningless Operations

constructive algorithms, math, number theory

Tape

greedy, sortings

Parity

math

Sasha and Algorithm of Silence's Sounds

data structures, trees

Sasha and a Very Easy Test

data structures, number theory

Sasha and Interesting Fact from Graph Theory

brute force, combinatorics, dp, math, trees

Sasha and a Patient Friend

binary search, data structures, implementation

Sasha and One More Name

constructive algorithms, hashing, strings

Sasha and a Bit of Relax

dp, implementation

MST Unification

binary search, dsu, graphs, greedy

Array and Segments (Hard version)

data structures, implementation

Array and Segments (Easy version)

brute force, greedy, implementation

Diverse Garland

constructive algorithms, dp, greedy

Nice Garland

brute force, greedy, math

Divisors of Two Integers

brute force, greedy, math, number theory

Two distinct points

implementation

Vasya and Maximum Profit

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

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

Vasya and Binary String

dp

Compression

dp, implementation, math, number theory

Brutality

greedy, sortings, two pointers

Digital root

math, number theory

Digits Sequence Dividing

greedy, strings

Lunar New Year and a Recursive Sequence

math, matrices, number theory

Lunar New Year and Red Envelopes

data structures, dp

Lunar New Year and a Wander

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

Lunar New Year and Number Division

greedy, implementation, math, sortings

Lunar New Year and Food Ordering

data structures, implementation

Lunar New Year and Cross Counting

implementation

Helping Hiasat

bitmasks, brute force, dp, meet-in-the-middle

Kilani and the Game

dfs and similar, graphs, implementation, shortest paths

Ayoub and Lost Array

combinatorics, dp, math

Zuhair and Strings

brute force, implementation, strings

Salem and Sticks

brute force, implementation

Game with string

data structures, implementation, math

Splitting into digits

constructive algorithms, implementation, math

Radix sum

fft, math, number theory

Professional layer

bitmasks, dp

Johnny Solving

constructive algorithms, dfs and similar, graphs, math

Game with modulo

binary search, constructive algorithms, interactive

Grid game

constructive algorithms, implementation

Elongated Matrix

binary search, bitmasks, brute force, dp, graphs

Monotonic Renumeration

combinatorics, sortings

Balanced Ternary String

greedy, strings

Doors Breaking and Repairing

games

Array K-Coloring

greedy, sortings

Integer Sequence Dividing

math

(Zero XOR Subset)-less

math, matrices

Trucks and Cities

binary search, dp

Polycarp's New Job

implementation

GCD Counting

data structures, dfs and similar, dp, number theory, trees

Division and Union

sortings

Accordion

greedy, implementation

Minimum Integer

math

Ivan and Burgers

data structures, divide and conquer, greedy, math

Andrew and Taxi

binary search, dfs and similar, graphs

Dasha and Chess

constructive algorithms, games, interactive

NN and the Optical Illusion

binary search, geometry, math

Build a Contest

data structures, implementation

Roman and Browser

implementation

Cookies

binary search, data structures, dfs and similar, dp, games, trees

Postcard

constructive algorithms, implementation

Squares and Segments

binary search, constructive algorithms, math