New Year and the Christmas Ornament

brute force, implementation, math

Ehab and another construction problem

brute force, constructive algorithms

The Fair Nut and Elevator

brute force, implementation

Berland Fair

binary search, brute force, data structures, greedy

BerOS File Suggestion

brute force, implementation

Monsters and Potions

brute force, dp, greedy, implementation

Make a triangle!

brute force, geometry, math

Candies for Children

brute force, math

Phone Numbers

brute force

DDoS

*special problem, brute force

Take Metro

brute force, data structures, graphs

Check Transcription

brute force, data structures, hashing, strings

Vasya and Multisets

brute force, dp, greedy, implementation, math

Mysterious Crime

brute force, combinatorics, math, meet-in-the-middle, two pointers

Vitamins

bitmasks, brute force, dp, implementation

Maximum Matching

bitmasks, brute force, dfs and similar, dp, graphs

Sources and Sinks

bitmasks, brute force, dfs and similar

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

Boolean Computer

bitmasks, brute force, fft, math

Permutation Game

brute force, dp, games

Familiar Operations

brute force, graphs, math

Multicolored Markers

binary search, brute force, math, number theory

Make Symmetrical

brute force

Recovering BST

brute force, dp, math, number theory, trees

Weakened Common Divisor

brute force, greedy, number theory

Single Wildcard Pattern Matching

brute force, implementation, strings

Badge

brute force, dfs and similar, graphs

Elections

brute force, greedy

The Films

brute force

The Neutral Zone

brute force, math

The Wu

bitmasks, brute force, data structures

Segment Occurrences

brute force, implementation

Stars Drawing (Easy Edition)

brute force, dp, greedy

Photo of The Sky

brute force, implementation, math, sortings

Planning The Expedition

binary search, brute force, implementation

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Pave the Parallelepiped

bitmasks, brute force, combinatorics, math, number theory

Xor-Paths

bitmasks, brute force, dp, meet-in-the-middle

Berland and the Shortest Paths

brute force, dfs and similar, graphs, shortest paths

Summarize to the Power of Two

brute force, greedy, implementation

Delete from the Left

brute force, implementation, strings

Sonya and Matrix

brute force, constructive algorithms, implementation

Intense Heat

brute force, implementation, math

Mishka and Contest

brute force, implementation

Roman Digits

brute force, combinatorics, dp, greedy, math

Convert to Ones

brute force, greedy, implementation, math

Leaving the Bar

brute force, data structures, geometry, greedy, math, sortings

Careful Maneuvering

bitmasks, brute force, geometry

Open Communication

bitmasks, brute force

Nastya and a Game

brute force, implementation, math

Concise and clear

brute force, greedy, implementation, math

Bus Number

brute force, combinatorics, math

Post Lamps

brute force, greedy

Divisibility by 25

brute force, greedy

Points and Powers of Two

brute force, math

Diverse Team

brute force, implementation

Three displays

brute force, dp, implementation

Prince's Problem

brute force, data structures, math, number theory, trees

Shark

brute force, data structures, dsu, trees

Row

brute force, constructive algorithms

Antipalindrome

brute force, implementation, strings

Kuro and GCD and XOR and SUM

binary search, bitmasks, brute force, data structures, dp, dsu, greedy, math, number theory, strings, trees

Almost Arithmetic Progression

brute force, implementation, math

Mancala

brute force, implementation

Cutting Rectangle

brute force, math, number theory

Make a Square

brute force, implementation, math

Chessboard

bitmasks, brute force, implementation

Full Binary Tree Queries

brute force, implementation, trees

Guard Duty (easy)

brute force, geometry, greedy, math

Encryption (easy)

brute force

Scissors

brute force, strings

A Map of the Cat

brute force, interactive

Binary Cards

brute force

Curfew

binary search, brute force, greedy, sortings

Protect Sheep

brute force, dfs and similar, graphs, implementation

Machine Learning

brute force, data structures

Points on the line

brute force, greedy, sortings

Constructing Tests

binary search, brute force, constructive algorithms

Run For Your Prize

brute force, greedy

Vile Grasshoppers

brute force, math, number theory

Fafa and his Company

brute force, implementation

A Compatible Pair

brute force, games

A Creative Cutout

brute force, combinatorics, math

Permutation Cycle

brute force, constructive algorithms

Friends Meeting

brute force, greedy, implementation, math

Cave Painting

brute force, number theory

Magic Forest

brute force

List Of Integers

binary search, bitmasks, brute force, combinatorics, math, number theory

SUM and REPLACE

brute force, data structures, dsu, number theory

Seat Arrangements

brute force, implementation

Perfect Number

binary search, brute force, dp, implementation, number theory

Supermarket

brute force, greedy, implementation

Eleven

brute force, implementation

Jamie and Alarm Snooze

brute force, implementation, math

Substrings in a String

bitmasks, brute force, data structures, string suffix structures, strings

Travelling Salesman and Special Numbers

brute force, combinatorics, dp

Perfect Squares

brute force, implementation, math

Too Easy Problems

binary search, brute force, data structures, greedy, sortings

Perun, Ult!

brute force, greedy, sortings

Inversion Counting

brute force, math