Inhabitant of the Deep Sea

greedy, implementation, math

Two Round Dances

combinatorics, math

Array and Operations

dp, greedy, math

Romantic Glasses

data structures, greedy, math

A and B and Team Training

greedy, implementation, math, number theory

Inflation

binary search, brute force, greedy, math

Shuffle

math, two pointers

Common Divisors

implementation, math

Number into Sequence

constructive algorithms, math, number theory

A Cookie for You

greedy, implementation, math

Nastia and a Good Array

constructive algorithms, math, number theory

3SUM

brute force, math

Anton and currency you all know

greedy, math, strings

Social Distance

constructive algorithms, greedy, math

Mere Array

constructive algorithms, math, number theory, sortings

Jzzhu and Sequences

implementation, math

Omkar and Last Class of Math

greedy, math, number theory

Number of Pairs

binary search, data structures, math, two pointers

K-th Beautiful String

binary search, brute force, combinatorics, implementation, math

Dreamoon and WiFi

bitmasks, brute force, combinatorics, dp, math, probabilities

Buying Shovels

math, number theory

Product of Three Numbers

greedy, math, number theory

Random Teams

combinatorics, constructive algorithms, greedy, math

T-primes

binary search, implementation, math, number theory

Extraordinarily Nice Numbers

*special problem, math

Mathematical Analysis Rocks!

constructive algorithms, implementation, math

Mischievous Mess Makers

greedy, math

Flea travel

implementation, math

Chess

brute force, implementation, math

Square

math

Easy Scheduling

implementation, math

Petya and Square

implementation, math

Depression

geometry, math

Sereja and Contests

greedy, implementation, math

Tiling with Hexagons

implementation, math

Food on the Plane

implementation, math

Heidi Learns Hashing (Easy)

brute force, math, number theory

Treasure Hunt

implementation, math, number theory

Cutting Carrot

geometry, math

HDD is Outdated Technology

implementation, math

Table Tennis Game 2

math

Opposites Attract

implementation, math

Inventory

greedy, math

Moore's Law

math

The Wall

math

Equations of Mathematical Magic

math

Levko and Permutation

constructive algorithms, math, number theory

Numbers on the Chessboard

implementation, math

Maxim Buys an Apartment

constructive algorithms, math

Game

games, math

Vasya and Book

implementation, math

Co-prime Array

greedy, implementation, math, number theory

Simple Molecules

brute force, graphs, math

Unnatural Conditions

constructive algorithms, math

The Bits

implementation, math

Sanatorium

binary search, constructive algorithms, greedy, implementation, math

Classroom Watch

brute force, math

Bear and Strings

brute force, greedy, implementation, math, strings

NN and the Optical Illusion

binary search, geometry, math

Nirvana

brute force, math, number theory

Joyboard

math, number theory

Pythagorean Theorem II

brute force, math

Equalize by Divide

brute force, constructive algorithms, greedy, math

Diameter of Graph

constructive algorithms, graphs, greedy, math

The Monster

brute force, math, number theory

LCM

math, number theory

Cells Not Under Attack

data structures, math

Minimum Triangulation

dp, greedy, math

Preparation for International Women's Day

math, number theory

Hexadecimal's Numbers

brute force, implementation, math

Divisor Subtraction

implementation, math, number theory

Game with Reversing

games, greedy, math, strings

AquaMoon and Stolen String

interactive, math

Friendly Arrays

bitmasks, greedy, math

Vika and the Bridge

binary search, data structures, greedy, implementation, math, sortings

Minimal Cost

brute force, math

Almost Equal

constructive algorithms, greedy, math

Incinerate

binary search, brute force, data structures, implementation, math, sortings

Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory

Game with string

data structures, implementation, math

Prefix Sum Primes

constructive algorithms, greedy, math, number theory

Playing in a Casino

math, sortings

Prefix Sum Addicts

constructive algorithms, greedy, math, sortings

Vanya and Books

implementation, math

Fear of the Dark

binary search, geometry, math

Hemose Shopping

constructive algorithms, dsu, math, sortings

Equal Rectangles

greedy, math

Make It Ugly

implementation, math

Super-Permutation

constructive algorithms, math

Stairs

brute force, constructive algorithms, greedy, implementation, math

Dolce Vita

binary search, brute force, greedy, math

Interesting Subarray

constructive algorithms, greedy, math

Long Multiplication

greedy, math, number theory

Fedya and Maths

math, number theory

Minimum Notation

data structures, greedy, math, sortings

Fancy Coins

binary search, brute force, greedy, math

Odd Sum Segments

constructive algorithms, math

Make Them Equal

math

Another Permutation Problem

brute force, dp, greedy, math

Creating the Contest

dp, greedy, math