Chamo and Mocha's Array

binary search, brute force, greedy

Long Multiplication

greedy, math, number theory

Make It Ugly

implementation, math

Battle Cows

binary search, data structures, greedy

Left and Right Houses

brute force

Rudolf and the Ball Game

dfs and similar, dp, implementation

Informatics in MAC

constructive algorithms

Yet Another Coin Problem

brute force, dp, greedy, math

Turtle Tenacity: Continual Mods

constructive algorithms, greedy, math, number theory, sortings

Equalize

binary search, greedy, sortings, two pointers

Vlad and a Sum of Sum of Digits

dp, implementation

A Balanced Problemset?

brute force, greedy, math, number theory

Forming Triangles

combinatorics, constructive algorithms, math, sortings

Training Before the Olympiad

constructive algorithms, games, greedy, implementation, math

Three Activities

brute force, dp, greedy, implementation, sortings

Make Almost Equal With Mod

bitmasks, constructive algorithms, math, number theory

Removal of Unattractive Pairs

constructive algorithms, greedy, math, strings

StORage room

bitmasks, brute force, constructive algorithms, greedy

Fear of the Dark

binary search, geometry, math

Perfect Square

brute force, implementation

Joyboard

math, number theory

Jellyfish and Game

brute force, games, greedy, implementation

Plus Minus Permutation

math

Friendly Arrays

bitmasks, greedy, math

Fancy Coins

binary search, brute force, greedy, math

Another Permutation Problem

brute force, dp, greedy, math

Assembly via Minimums

greedy, sortings

Fibonaccharsis

binary search, brute force, math

Vika and the Bridge

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

Rudolph and Christmas Tree

constructive algorithms, geometry, math

Rudolf and the Another Competition

constructive algorithms, data structures, dp, greedy, sortings

Apple Tree

combinatorics, dfs and similar, dp, math, trees

Game with Reversing

games, greedy, math, strings

Contrast Value

greedy, implementation

Trust Nobody

brute force, greedy, implementation, sortings

Super-Permutation

constructive algorithms, math

Playing in a Casino

math, sortings

Remove Two Letters

data structures, greedy, hashing, strings

Equalize by Divide

brute force, constructive algorithms, greedy, math

Dora and Search

constructive algorithms, data structures, two pointers

Stand-up Comedian

greedy, math

Matryoshkas

data structures, greedy, sortings

Подкрутка I

*special problem, brute force, dp, greedy

Incinerate

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

Swap Game

games

Divisibility by 2^n

greedy, math, sortings

Scuza

binary search, greedy, math

Prefix Sum Addicts

constructive algorithms, greedy, math, sortings

Playing with GCD

math, number theory

Removing Smallest Multiples

greedy, math

Minimum Notation

data structures, greedy, math, sortings

Friends and the Restaurant

greedy, sortings, two pointers

Corners

greedy, implementation

Build Permutation

constructive algorithms, dp, math

Virus

greedy, implementation, sortings

Mirror Grid

implementation

Paranoid String

constructive algorithms, greedy

Binary Deque

binary search, implementation, two pointers

Double Sort

implementation, sortings

Stone Age Problem

data structures, implementation

A-B-C Sort

constructive algorithms, implementation, sortings

Dolce Vita

binary search, brute force, greedy, math

Fall Down

dfs and similar, implementation

2-Letter Strings

data structures, math, strings

Bracket Sequence Deletion

greedy, implementation

Make Equal With Mod

constructive algorithms, math, number theory, sortings

Weight of the System of Nested Segments

greedy, hashing, implementation, sortings

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Great Sequence

brute force, greedy, sortings

Andrew and Stones

greedy, implementation

Differential Sorting

constructive algorithms, greedy

Wrong Addition

implementation

Poisoned Dagger

binary search

Build the Permutation

constructive algorithms, greedy

Delete Two Elements

data structures, dp, implementation, math, two pointers

Make Them Equal

brute force, greedy, math, strings

Hemose Shopping

constructive algorithms, dsu, math, sortings

Omkar and Heavenly Tree

constructive algorithms, trees

Grandma Capa Knits a Scarf

brute force, data structures, greedy, strings, two pointers

Diameter of Graph

constructive algorithms, graphs, greedy, math

Easy Scheduling

implementation, math

Mocha and Hiking

constructive algorithms, graphs

Penalty

bitmasks, brute force, dp, greedy

AquaMoon and Stolen String

interactive, math

Pleasant Pairs

brute force, implementation, math, number theory

Stable Groups

greedy, sortings

Challenging Cliffs

constructive algorithms, greedy, implementation, math

Prinzessin der Verurteilung

brute force, constructive algorithms, strings

Pursuit

binary search, brute force, greedy, sortings

Palindrome Game (easy version)

constructive algorithms, games

Same Differences

data structures, hashing, math

Morning Jogging

constructive algorithms, greedy, sortings

AND 0, Sum Big

bitmasks, combinatorics, math

Corrupted Array

constructive algorithms, data structures, greedy

A-B Palindrome

constructive algorithms, implementation, strings

King's Task

brute force, graphs, implementation

Flip the Bits

constructive algorithms, greedy, implementation, math

k-LCM (easy version)

constructive algorithms, math

M-arrays

constructive algorithms, greedy, math

Diamond Miner

geometry, greedy, math, sortings