Flamingoes of Mystery

interactive

Arpa and an exam about geometry

geometry, math

Point on Spiral

brute force, geometry, implementation

Ilya and Matrix

constructive algorithms, greedy, implementation, sortings

Knights of a Polygonal Table

greedy, implementation, sortings

Sorting by Subsequences

dfs and similar, dsu, implementation, math, sortings

Photographer

greedy, sortings

XOUR

data structures, dsu, sortings

Mishka and trip

implementation, math

Barnicle

brute force, implementation, math, strings

Special Offer! Super Price 999 Bourles!

implementation

Double Matrix

brute force, greedy

Little Elephant and Sorting

brute force, greedy

Tea Party

constructive algorithms, greedy, sortings

Valera and Contest

constructive algorithms, implementation, math

Fibonacci Words

*special problem, implementation

Design Tutorial: Make It Nondeterministic

greedy

Arena of Greed

games, greedy

Cows and Primitive Roots

implementation, math, number theory

New Year Ratings Change

greedy, sortings

Birthday

math

A Compatible Pair

brute force, games

Pasha Maximizes

greedy

Gena's Code

implementation, math

Vile Grasshoppers

brute force, math, number theory

Colorful Field

implementation, sortings

Guess the Array

constructive algorithms, interactive, math

Valera and Fruits

greedy, implementation

Three Garlands

brute force, constructive algorithms

Suit and Tie

greedy, implementation, math

Cutting Banner

brute force, implementation

Letter

dp

String Typing

implementation, strings

Battling with Numbers

combinatorics, math, number theory

Views Matter

greedy, implementation, sortings

Developing Skills

implementation, math, sortings

Restoring Painting

brute force, constructive algorithms, math

Non-square Equation

binary search, brute force, math

Sonya and Robots

constructive algorithms, implementation

Berpizza

data structures, implementation

One Bomb

implementation

USB vs. PS/2

greedy, implementation, sortings, two pointers

Vanya and Food Processor

implementation, math

Towers

brute force, constructive algorithms, greedy, implementation, sortings

Win or Freeze

games, math, number theory

Dima and Continuous Line

brute force, implementation

Replace To Make Regular Bracket Sequence

data structures, expression parsing, math

Permutation

constructive algorithms, dp, math

Make a Square

brute force, implementation, math

Tanya and Postcard

greedy, implementation, strings

Common Divisors

brute force, hashing, implementation, math, strings

Sea and Islands

constructive algorithms, implementation

Ehab and a 2-operation task

constructive algorithms, greedy, math

Flag Day

constructive algorithms, implementation

K-Dominant Character

binary search, implementation, two pointers

Factory

implementation, math, matrices

Inscribed Figures

geometry

Skier

data structures, implementation

Strongly Connected City

brute force, dfs and similar, graphs, implementation

You Are So Beautiful

data structures

More Cowbell

binary search, greedy

Mike and Fun

brute force, dp, greedy, implementation

Yuhao and a Parenthesis

greedy, implementation

Connect

brute force, dfs and similar, dsu

Sonya and Queries

data structures, implementation

Anatoly and Cockroaches

greedy

Chris and Magic Square

constructive algorithms, implementation

T-shirt buying

data structures, implementation

Optimal Point on a Line

brute force, sortings

Matching Arrays

binary search, constructive algorithms, greedy, sortings

Guess a number!

greedy, implementation, two pointers

Optimal Currency Exchange

brute force, math

Our Tanya is Crying Out Loud

dp, greedy

Binary Strings are Fun

combinatorics, math

Cd and pwd commands

*special problem, data structures, implementation

Two-Colored Dominoes

constructive algorithms, greedy

Swap Adjacent Elements

dfs and similar, greedy, math, sortings, two pointers

Doremy's City Construction

graphs, greedy

Routine Problem

greedy, math, number theory

Set Construction

constructive algorithms, dfs and similar, graphs, greedy

Permutation Counting

binary search, greedy, implementation, math, sortings

Pasha and String

constructive algorithms, greedy, math, strings

Tokitsukaze and Discard Items

implementation, two pointers

Dances (Easy version)

binary search, greedy, two pointers

Bus Video System

combinatorics, math

Complementary XOR

constructive algorithms, implementation

Diverse Matrix

constructive algorithms, greedy, math, number theory

Valhalla Siege

binary search

Books Queries

implementation

Complex Market Analysis

binary search, dp, implementation, number theory, schedules, two pointers

Minimum number of steps

combinatorics, greedy, implementation, math

Where is the Pizza?

data structures, dfs and similar, dsu, graphs, implementation, math

Phase Shift

dfs and similar, dsu, graphs, greedy, implementation, strings

Grid game

constructive algorithms, implementation

Draw!

greedy, implementation

Ticket Hoarding

greedy, math, sortings

Round Corridor

math, number theory

Arrays Sum

constructive algorithms, greedy, math

New Year and the Sphere Transmission

math, number theory

Reverse Card (Easy Version)

brute force, math, number theory