Unusual Graph

*special problem, graphs

Road Repair in Treeland

*special problem, binary search, dp, trees

University Schedule

*special problem

Scheduler for Invokers

*special problem

The Hero with Bombs

*special problem

Perfectionist Arkadiy

*special problem, number theory

Feed the Golorp

*special problem

Black Cat Rush

*special problem

Superstitions Inspection

*special problem

Greedy Petya

*special problem, dfs and similar, graphs, greedy

HQ

*special problem, constructive algorithms

Deutsch-Jozsa algorithm

*special problem

Loader

*special problem

Rotate Matrix

*special problem

Different variables

*special problem

Suffix Subgroup

*special problem, strings

Pens And Days Of Week

*special problem, binary search, number theory

Array Sorting

*special problem

On a plane

*special problem

Non-decimal sum

*special problem

Hungarian Notation

*special problem

King's Path

*special problem, math, trees

Truncatable primes

*special problem

INI-file

*special problem, implementation

Sort the Table

*special problem, sortings

Composing Of String

*special problem, dp

Hamming Distance

*special problem

BHTML+BCSS

*special problem, dfs and similar, expression parsing

Touchy-Feely Palindromes

*special problem, implementation

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

Interval Coloring

*special problem, greedy, math

Perse-script

*special problem, expression parsing

Brackets

*special problem

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Array sorting

*special problem, sortings

Big Number and Remainder

*special problem, math, number theory

Repairing Of String

*special problem, constructive algorithms

Distinguish multi-qubit basis states

*special problem

Distinguish Bell states

*special problem

Autocompletion

*special problem, strings, trees

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Alternating case

*special problem

Date Change

*special problem

Chain Letter

*special problem, dfs and similar, graphs

Table Bowling

*special problem, sortings

Levenshtein distance

*special problem

Jumping frogs

*special problem

Pairwise Sums

*special problem

Date calculation

*special problem

Path Canonization

*special problem

Significant Cups

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

Amusement Park

*special problem, ternary search

Tanya and Colored Candies

*special problem, dp

INTERCALC

*special problem, implementation

Generate GHZ state

*special problem

Distinguish plus state and minus state

*special problem

Kids' Riddle

*special problem

Hostname Aliases

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

Dependency management

*special problem, graphs, implementation

Phone Talks

*special problem, dp, sortings

000001

*special problem

Euclidean Distance

*special problem

Battleship

*special problem, dfs and similar, implementation

Divisibility Check

*special problem

Caesar Cipher

*special problem

Primes in Interval

*special problem

Array Sum

*special problem

Double Permutation Inc.

*special problem, binary search, greedy

Points in triangle

*special problem, geometry

Prime factorization

*special problem

Teams

*special problem, binary search, greedy, math

Caesar Cipher

*special problem

Block unitary

*special problem

Palindrome checker oracle

*special problem

A polyline

*special problem, implementation

Chessboard unitary

*special problem

Bars

*special problem, binary search

Anti-diagonal unitary

*special problem

OR oracle

*special problem

AND oracle

*special problem

You're a Professional

*special problem

Without Text

*special problem

Rosetta Problem

*special problem

Crunching Numbers Just for You

*special problem, implementation

Generate plus state or minus state

*special problem

Closest Equals

*special problem, data structures

Parallel Programming

*special problem, greedy

Processing Queries

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

Exchange of Books

*special problem

Oil

*special problem, greedy, math

The Fraction

*special problem

Maximal Difference

*special problem

Factorial zeros

*special problem

Domain

*special problem, expression parsing

Eval

*special problem

Stepan's Series

*special problem, dp

Ace It!

*special problem

Dome

*special problem

A Piece of Cake

*special problem, implementation