Number Factorization

greedy, math, number theory

Cake Assembly Line

brute force, sortings

Matrix of Differences

constructive algorithms, math

GCD Partition

brute force, greedy, math, number theory

The Forbidden Permutation

greedy, math

Beppa and SwerChat

two pointers

Gardener and the Array

bitmasks, constructive algorithms

Ice and Fire

constructive algorithms, dp, greedy

Подкрутка II

*special problem, dp

Подкрутка I

*special problem, brute force, dp, greedy

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Hamiltonian Wall

dp, implementation

Incinerate

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

Make Array Good

constructive algorithms, implementation, number theory, sortings

Binary Inversions

data structures, greedy, math

Thermostat

greedy, math, shortest paths

Make Nonzero Sum (easy version)

constructive algorithms, dp, greedy

Swap Game

games

Permutation Operations

constructive algorithms, greedy, implementation, math

Divisibility by 2^n

greedy, math, sortings

Save the Magazines

constructive algorithms, dp, greedy

Scuza

binary search, greedy, math

Coprime

brute force, greedy, number theory

Masha and a Beautiful Tree

dfs and similar, divide and conquer, graphs, sortings, trees

Minimize the Thickness

brute force, greedy, math, two pointers

Array Recovery

constructive algorithms, greedy, math

Prefix Sum Addicts

constructive algorithms, greedy, math, sortings

Ela's Fitness and the Luxury Number

binary search, implementation, math

Good Subarrays (Easy Version)

binary search, data structures, schedules, two pointers

Playing with GCD

math, number theory

Removing Smallest Multiples

greedy, math

Parity Shuffle Sorting

constructive algorithms, sortings

Kill Demodogs

greedy, math

Minimum Notation

data structures, greedy, math, sortings

Friends and the Restaurant

greedy, sortings, two pointers

Jumping on Tiles

constructive algorithms, strings

Jatayu's Balanced Bracket Sequence

data structures, dsu, graphs, greedy

Mainak and Interesting Sequence

bitmasks, constructive algorithms, math

Line

greedy, sortings

Corners

greedy, implementation

Madoka and Formal Statement

greedy

Madoka and Underground Competitions

constructive algorithms, implementation

Build Permutation

constructive algorithms, dp, math

Sort Zero

greedy, sortings

Party

brute force, graphs

Difference of GCDs

constructive algorithms, math

Making Towers

dp, greedy, math

Virus

greedy, implementation, sortings

Yet Another Problem About Pairs Satisfying an Inequality

binary search, data structures, dp, greedy, sortings

Mirror Grid

implementation

Double Strings

brute force, data structures, strings

Train and Queries

data structures, greedy

Palindromic Numbers

constructive algorithms, implementation, math

3SUM Closure

brute force, data structures

Paranoid String

constructive algorithms, greedy

Directional Increase

greedy

3SUM

brute force, math

Binary Deque

binary search, implementation, two pointers

The Clock

brute force, implementation

Circular Local MiniMax

constructive algorithms, greedy, sortings

AND Sorting

bitmasks, constructive algorithms, sortings

Double Sort

implementation, sortings

Stone Age Problem

data structures, implementation

White-Black Balanced Subtrees

dfs and similar, dp, graphs, trees

Longest Strike

data structures, greedy, implementation, sortings, two pointers

Eating Queries

binary search, greedy, sortings

Vertical Paths

graphs, implementation, trees

Detective Task

implementation

A-B-C Sort

constructive algorithms, implementation, sortings

A Perfectly Balanced String?

brute force, greedy, strings

Unequal Array

constructive algorithms, greedy, implementation

Dolce Vita

binary search, brute force, greedy, math

Dorms War

brute force, implementation, strings

Maximal AND

bitmasks, greedy, math

Fall Down

dfs and similar, implementation

Eating Candies

binary search, data structures, greedy, two pointers

2-Letter Strings

data structures, math, strings

Colorful Stamp

implementation

Make it Increasing

brute force, greedy, math

Getting Zero

bitmasks, brute force, dfs and similar, dp, graphs, greedy, shortest paths

Get an Even String

dp, greedy, strings

Bit Flipping

bitmasks, constructive algorithms, greedy, strings

Bracket Sequence Deletion

greedy, implementation

Make Equal With Mod

constructive algorithms, math, number theory, sortings

Subtract Operation

data structures, greedy, math, two pointers

Twist the Permutation

brute force, constructive algorithms, implementation, math

Weight of the System of Nested Segments

greedy, hashing, implementation, sortings

Game of Ball Passing

greedy, implementation

Madoka and Childish Pranks

constructive algorithms, greedy

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Great Sequence

brute force, greedy, sortings

Inversion Graph

data structures, dsu, graphs, math

Odd Swap Sort

data structures, math, sortings

Andrew and Stones

greedy, implementation

MEX and Array

brute force, dp, greedy, math

Differential Sorting

constructive algorithms, greedy

Kill the Monster

brute force, math

Fun with Even Subarrays

dp, greedy

Not Sitting

games, greedy, sortings

Minor Reduction

greedy, strings