Zero-XOR Array

*special problem, dp

Cyclic Shifts

*special problem, strings

Number Deletion Game

*special problem, dp, games, greedy

Rogue-like Game

*special problem, brute force, greedy, two pointers

Neural Network Problem

*special problem, binary search, greedy

Chess Match

*special problem

Used Markers

*special problem, greedy

Black Friday

*special problem, implementation

Polycarp and the Language of Gods

*special problem, implementation, two pointers

Selling Hamburgers

*special problem

Chess Rush

*special problem, combinatorics, dp, implementation, math

Spring cleaning

*special problem, data structures, dfs and similar, graphs, trees

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Roads

*special problem, geometry, sortings

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Viruses

*special problem, dp, shortest paths, string suffix structures

Village (Maximum)

*special problem, dfs and similar, trees

Village (Minimum)

*special problem, dp, greedy, trees

Graph

*special problem, binary search, dfs and similar, dp, math, ternary search

Joker

*special problem, bitmasks, data structures, divide and conquer, dsu

Mixture

*special problem, data structures, geometry, math, sortings

Colors

*special problem, binary search, constructive algorithms, interactive

Quantum Classification - 2

*special problem

Quantum Classification - 1

*special problem

Prepare state |01⟩ + |10⟩ + |11⟩

*special problem

Decrement

*special problem

Increment

*special problem

Distinguish Z from -Z

*special problem

Distinguish I ⊗ X from CNOT

*special problem

Distinguish Z from S

*special problem

Distinguish I from Z

*special problem

Distinguish I from X

*special problem

Pac-Man 2.0

*special problem, dp

Game with Segments

*special problem, data structures, games

Two IP Cameras

*special problem, math, number theory

Dune II: Battle For Arrakis

*special problem, data structures, greedy, math

Magic Tricks

*special problem, dp, graphs

Constructing the Dungeon

*special problem, graphs, greedy

Spring Cleaning

*special problem, greedy, sortings

Boot Camp

*special problem, greedy

Color Revolution

*special problem, math

Falling Blocks

*special problem, data structures

Paint the String

*special problem, dp, strings

M-numbers

*special problem, dp, math

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Modernization of Treeland

*special problem, dfs and similar, trees

Bonus Distribution

*special problem, binary search, greedy, sortings

Dream Team

*special problem, greedy

Cartoons

*special problem, implementation, sortings

Likes Display

*special problem, implementation

Шардирование постов

*special problem, binary search, interactive

Контрольная сумма

*special problem

Контрольная сумма

*special problem

Контрольная сумма

*special problem

Storage2

*special problem

#define Задача B ...

*special problem

Code Review

*special problem

Скрытый друг

*special problem

Unusual Graph

*special problem, graphs

Road Repair in Treeland

*special problem, binary search, dp, trees

King's Path

*special problem, math, trees

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Double Permutation Inc.

*special problem, binary search, greedy

Teams

*special problem, binary search, greedy, math

Ice Cream

*special problem, greedy, sortings

Traveling Around the Golden Ring of Berland

*special problem, implementation

Three Problems

*special problem, implementation

Magic Tree

*special problem, data structures, dp, trees

Amusement Park

*special problem, dp, math

Scissors and Tape

*special problem, constructive algorithms, geometry

Building Skyscrapers

*special problem

Cubeword

*special problem, brute force, dp, meet-in-the-middle

Dynamic Diameter

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

Good Subsets

*special problem, dp

Longest Saw

*special problem, constructive algorithms

Graph Decomposition

*special problem, graphs

Wheels

*special problem, binary search, greedy

Sliding Doors

*special problem, binary search

Decoding of Integer Sequences

*special problem, data structures, implementation

Minus and Minus Give Plus

*special problem, implementation, strings

Bad Days

*special problem, implementation

Three Integers Again

*special problem, math

Collaboration

*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

Tanya and Colored Candies

*special problem, dp

DDoS

*special problem, brute force

Bmail Computer Network

*special problem, dfs and similar, trees

Deutsch-Jozsa algorithm

*special problem

Oracle for f(x) = parity of the number of 1s in x

*special problem

Oracle for f(x) = k-th element of x

*special problem

Distinguish multi-qubit basis states

*special problem

Distinguish Bell states

*special problem

Distinguish plus state and minus state

*special problem

Generate GHZ state

*special problem