Drinks

implementation, math

Hexadecimal's theorem

brute force, constructive algorithms, implementation, number theory

About Bacteria

implementation, math

Try and Catch

expression parsing, implementation

After Training

data structures, implementation, math

Exams

implementation, math

Walking in the Rain

brute force, implementation

Funky Numbers

binary search, brute force, implementation

Stack

*special problem, expression parsing, implementation

Array Sorting

*special problem, implementation

Binary Notation

*special problem, implementation

HQ9+

*special problem, implementation

Asterisks

*special problem, implementation

LCM

*special problem, implementation, math

A + Reverse B

*special problem, implementation

Comparing Strings

implementation, strings

Common Divisors

brute force, hashing, implementation, math, strings

Vasya's Calendar

implementation

Battlefield

geometry, graphs, implementation, shortest paths

Series of Crimes

brute force, geometry, implementation

Mathematical Analysis Rocks!

constructive algorithms, implementation, math

Defragmentation

implementation

Good Matrix Elements

implementation

Good Matrix Elements

implementation

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Geometry Horse

greedy, implementation, sortings, two pointers

Plane of Tanks: Pro

implementation

Robot Bicorn Attack

brute force, implementation

File List

dp, greedy, implementation

Deputies

constructive algorithms, graphs, greedy, implementation

Rock-Paper-Scissors

implementation, math

Bus

*special problem, implementation, sortings

Pseudorandom Sequence Period

*special problem, implementation, number theory

Phone Code

*special problem, brute force, implementation

A polyline

*special problem, implementation

ucyhf

*special problem, brute force, implementation, number theory

A Piece of Cake

*special problem, implementation

Wizards and Minimal Spell

implementation, strings

Wizards and Demonstration

implementation, math

Wizards and Trolleybuses

implementation, math

Rank List

binary search, implementation, sortings

Burning Midnight Oil

binary search, implementation

Supercentral Point

implementation

Pentagonal numbers

*special problem, implementation

Find Pair

implementation, math, sortings

Friends or Not

*special problem, greedy, implementation

Cd and pwd commands

*special problem, data structures, implementation

Taxi

*special problem, greedy, implementation

Next Round

*special problem, implementation

Suspects

constructive algorithms, data structures, implementation

Steps

binary search, implementation

Marks

implementation

Phone Numbers

implementation, strings

Soft Drinking

implementation, math

Martian Clock

implementation

Business trip

greedy, implementation, sortings

Escape

implementation, math

Insomnia cure

constructive algorithms, implementation, math

Punctuation

implementation, strings

Lucky Mask

brute force, implementation

Lucky Ticket

implementation

Lucky Pair

combinatorics, data structures, implementation

Lucky Conversion

greedy, implementation

Anagram Search

implementation, strings

Meeting

implementation

Arrival of the General

implementation

Help Kingdom of Far Far Away 2

implementation, strings

Help General

constructive algorithms, greedy, implementation

Amusing Joke

implementation, sortings, strings

New Year Cards

brute force, greedy, implementation

Wallpaper

implementation, math

Petr and Book

implementation

Literature Lesson

implementation

Last Chance

data structures, implementation, strings

Postcards and photos

implementation

Ternary Logic

implementation, math

Presents

implementation

Cycle

brute force, dfs and similar, implementation

Replacement

greedy, implementation, sortings

Average Numbers

brute force, implementation

Unary

implementation

HQ9+

implementation

Piet

implementation

Turing Tape

implementation

Opposites Attract

implementation, math

cAPS lOCK

implementation, strings

Gnikool Ssalg

*special problem, implementation, strings

Hexagonal numbers

*special problem, implementation

Students and Shoelaces

brute force, dfs and similar, graphs, implementation

Cookies

implementation

Numbers

constructive algorithms, implementation

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Canvas Frames

implementation

Simple XML

implementation

Permutations

brute force, combinatorics, implementation

Prime Permutation

implementation, number theory, strings

Lucky Substring

brute force, implementation

Lucky Segments

binary search, implementation, two pointers

Lucky Sum

implementation

Boom

implementation