Building Skyscrapers

*special problem

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

Generate Bell state

*special problem

Generate plus state or minus state

*special problem

Красивая команда

*special problem, combinatorics, math

Места в самолёте

*special problem, implementation

Прокат велосипедов

*special problem, greedy, implementation

Autocompletion

*special problem, strings, trees

Dependency management

*special problem, graphs, implementation

Chat

*special problem, dp

Login Verification

*special problem, strings

BuberPool Taxi Optimization

*special problem, interactive

BF Calculator

*special problem

Crunching Numbers Just for You

*special problem, implementation

Twisted Circuit

*special problem, brute force, implementation

Touchy-Feely Palindromes

*special problem, implementation

INTERCALC

*special problem, implementation

Kids' Riddle

*special problem

Numbers Joke

*special problem

University Schedule

*special problem

Bars

*special problem, binary search

Stepan and Vowels

*special problem, implementation, strings

Stepan's Series

*special problem, dp

Composing Of String

*special problem, dp

Repairing Of String

*special problem, constructive algorithms

Perfectionist Arkadiy

*special problem, number theory

Pens And Days Of Week

*special problem, binary search, number theory

Big Number and Remainder

*special problem, math, number theory

Lie or Truth

*special problem, constructive algorithms, implementation, sortings

Maximum Number

*special problem, constructive algorithms, greedy, implementation

Significant Cups

*special problem, binary search, data structures, two pointers

Amusement Park

*special problem, ternary search

Draw Brackets!

*special problem, implementation

Online Courses In BSU

*special problem, dfs and similar, graphs, implementation

Maximize Sum of Digits

*special problem, implementation, math

New Password

*special problem, implementation

k-Interesting Pairs Of Integers

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

Cycle In Maze

*special problem, dfs and similar, graphs, greedy, shortest paths

News About Credit

*special problem, greedy, two pointers

Year of University Entrance

*special problem, implementation, sortings

The Hero with Bombs

*special problem

Loader

*special problem, graphs

Exchange of Books

*special problem

The Fraction

*special problem

Reformat the String

*special problem

Hammer throwing

*special problem

Chocolate Bar

*special problem, math

Symmetric Difference

*special problem

The Teacher of Physical Education

*special problem

The Check of the Point

*special problem, geometry

Rotate Matrix

*special problem

Hungarian Notation

*special problem

Primes in Interval

*special problem

Divisibility Check

*special problem

Maximal Difference

*special problem

Array Sum

*special problem

Seasons

*special problem

Lazy Caterer Sequence

*special problem

You're a Professional

*special problem

Ace It!

*special problem

Out of Controls

*special problem

Rosetta Problem

*special problem

Without Text

*special problem

Scrambled

*special problem, implementation

Da Vinci Powers

*special problem

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Processing Queries

*special problem, constructive algorithms, data structures, two pointers

Parliament of Berland

*special problem, constructive algorithms

Road Improvement

*special problem, dfs and similar, graphs, greedy, trees

Making Genome in Berland

*special problem, dfs and similar, strings

Home Numbers

*special problem, constructive algorithms, math

Running with Obstacles

*special problem, data structures, dp, greedy

Promocodes with Mistakes

*special problem, brute force, constructive algorithms, implementation

Chat Order

*special problem, binary search, constructive algorithms, data structures, sortings

Voting for Photos

*special problem, constructive algorithms, implementation