Path Queries

divide and conquer, dsu, graphs, sortings, trees

Two Small Strings

brute force, constructive algorithms

Equalizing by Division (hard version)

brute force, math, sortings

Equalizing by Division (easy version)

brute force, implementation

Ice Cream

*special problem, greedy, sortings

Traveling Around the Golden Ring of Berland

*special problem, implementation

Marcin and Training Camp

brute force, greedy

Anadi and Domino

brute force, graphs

Cow and Snacks

dfs and similar, dsu, graphs

Paint the Digits

constructive algorithms, greedy, implementation

Koala and Lights

implementation, math, number theory

Restore Permutation

binary search, data structures, greedy, implementation

Magic Grid

constructive algorithms

Uniqueness

binary search, brute force, implementation, two pointers

XOR Guessing

bitmasks, interactive, math

Number Of Permutations

combinatorics

Gas Pipeline

dp, greedy

Shortest Cycle

bitmasks, brute force, graphs, shortest paths

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Boxers

greedy, sortings

Remove the Substring (hard version)

binary search, greedy, implementation, two pointers

Remove the Substring (easy version)

greedy, implementation

Common Divisors

implementation, math

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

You Are Given a Decimal String...

brute force, dp, shortest paths

Maximum Median

binary search, greedy, math, sortings

Zero Array

greedy, math

White Lines

brute force, data structures, dp, implementation, two pointers

Round Corridor

math, number theory

Welfare State

binary search, brute force, data structures, sortings

MP3

sortings, two pointers

Yet Another Subarray Problem

dp, greedy, math

Array Splitting

greedy, sortings

Connected Component on a Chessboard

constructive algorithms, implementation

RGB Substring (hard version)

data structures, dp, implementation, two pointers

RGB Substring (easy version)

implementation

Robot Breakout

implementation

Submarine in the Rybinsk Sea (hard edition)

combinatorics, math, number theory

Submarine in the Rybinsk Sea (easy edition)

combinatorics, math, number theory

Basketball Exercise

dp

1-2-K Game

games, math

From S To T

implementation, strings

Yet Another Crosses Problem

implementation

Tokitsukaze, CSL and Stone Game

games

Tokitsukaze and Discard Items

implementation, two pointers

Candies!

data structures, dp, implementation, math

Add on a Tree

trees

Vasya And Array

constructive algorithms, greedy, implementation

Letters Shop

binary search, implementation, strings

Vus the Cossack and Numbers

constructive algorithms, greedy, math

Vus the Cossack and Strings

implementation, math

Extra Element

implementation, math

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Daleks' Invasion (easy)

graphs, trees

Parallel Universes (Easy)

implementation

Heidi and the Turing Test (Easy)

implementation

The Doctor Meets Vader (Easy)

binary search, sortings

Subsequences (hard version)

dp, strings

Candy Box (easy version)

greedy, sortings

Computer Game

binary search, math

Beautiful Lyrics

data structures, greedy, strings

Plus from Picture

dfs and similar, implementation, strings

Flag

brute force, combinatorics, dp, implementation

Split a Number

greedy, implementation, strings

Nick and Array

greedy, implementation

Tolik and His Uncle

constructive algorithms

Valeriy and Deque

data structures, implementation

Archaeology

brute force, constructive algorithms, greedy, strings

Prime Graph

constructive algorithms, greedy, math, number theory

Tiles

combinatorics, greedy, math

WOW Factor

dp, strings

Digits Sequence (Hard Edition)

binary search, divide and conquer, implementation

Cover it!

dfs and similar, dsu, graphs, shortest paths, trees

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Lose it!

dp, greedy, implementation

Array Splitting

greedy, sortings

Electrification

binary search, brute force, greedy

Catch Overflow!

data structures, expression parsing, implementation

Ehab and the Expected XOR Problem

bitmasks, constructive algorithms

Ehab and a Special Coloring Problem

constructive algorithms, number theory

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Nauuo and Cards

greedy, implementation

Pairs

graphs, implementation

Good Triple

brute force, two pointers

Increasing by Modulo

binary search, greedy

Bicolored RBS

constructive algorithms, greedy

News Distribution

dfs and similar, dsu, graphs

Lost Numbers

brute force, divide and conquer, interactive, math

A Tale of Two Lands

binary search, sortings, two pointers

Two Arrays and Sum of Functions

greedy, math, sortings

Almost All Divisors

math, number theory

Good String

greedy

Power Transmission (Hard Edition)

data structures, geometry, implementation, math

Power Transmission (Easy Edition)

brute force, geometry

Cat Party (Hard Edition)

data structures, implementation

Cat Party (Easy Edition)

data structures, implementation

Double Matrix

brute force, greedy

Expansion coefficient of the array

implementation, math

The Party and Sweets

binary search, constructive algorithms, greedy, implementation, math, sortings, two pointers

Minimum Array

binary search, data structures, greedy