Maximal GCD

constructive algorithms, greedy, math

Two Small Strings

brute force, constructive algorithms

Alice and Hairdresser

dsu, implementation

2+ doors

2-sat, bitmasks, graphs, greedy

Edge Deletion

graphs, greedy, shortest paths

Zero Tree

dfs and similar, dp, greedy, trees

Hometask

brute force, constructive algorithms, greedy, math

Ksyusha and Chinchilla

constructive algorithms, dfs and similar, dp, dsu, greedy, implementation, trees

Irreducible Anagrams

binary search, constructive algorithms, data structures, strings, two pointers

Bear and Compressing

brute force, dfs and similar, dp, strings

Longtail Hedgehog

dp, graphs

Too Many Segments (hard version)

data structures, greedy, sortings

Mike and Chocolate Thieves

binary search, combinatorics, math

Code Parsing

implementation

Dirty Deeds Done Dirt Cheap

greedy, sortings

PermuTree (easy version)

dfs and similar, dp, trees

Print a 1337-string...

combinatorics, constructive algorithms, math, strings

Colorful Grid

constructive algorithms

Garbage Disposal

greedy

Andrey and Problem

greedy, math, probabilities

Whose sentence is it?

implementation, strings

Desktop Rearrangement

data structures, greedy, implementation

Extract Numbers

implementation, strings

1-Trees and Queries

data structures, dfs and similar, shortest paths, trees

Reset K Edges

binary search, data structures, dfs and similar, graphs, greedy, trees

Road Map

dfs and similar, graphs

Video Posts

implementation

Magical Array

constructive algorithms, hashing, implementation, math

A Twisty Movement

dp

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Autocomplete

implementation

Pair of Numbers

binary search, brute force, data structures, math, two pointers

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Maximum Subrectangle

binary search, implementation, two pointers

Too Many Segments (easy version)

greedy

Nearest Excluded Points

binary search, data structures, dfs and similar, graphs, shortest paths

Irrational problem

implementation, number theory

Half of Same

brute force, math, number theory

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

The Door Problem

2-sat, dfs and similar, dsu, graphs

Round Subset

dp, math

Quiz

binary search, greedy, math, matrices, number theory

Watering Flowers

implementation

Anfisa the Monkey

dp

Pavel and Triangles

brute force, dp, fft, greedy, ternary search

Frog Traveler

data structures, dfs and similar, dp, graphs, shortest paths, two pointers

Ring road

graphs

Music

implementation, math

Python Indentation

dp

Triangle

brute force, geometry, implementation, math

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

Maximal Binary Matrix

constructive algorithms

Sonya and Problem Wihtout a Legend

dp, sortings

Not simply beatiful strings

implementation

Serval and Rooted Tree

binary search, dfs and similar, dp, greedy, trees

Benches

combinatorics, math

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

King of Thieves

brute force, implementation

Black Cells

binary search, brute force, greedy, math

Find Maximum

implementation, math, number theory

Long Jumps

binary search, greedy, implementation

Kalila and Dimna in the Logging Industry

dp, geometry

Settlers' Training

implementation

Restorer Distance

binary search, greedy, math, sortings, ternary search

Nauuo and Cards

greedy, implementation

Kuroni and the Celebration

constructive algorithms, dfs and similar, interactive, trees

Checkpoints

greedy, implementation, sortings

Buy Low Sell High

constructive algorithms, data structures, greedy

s-palindrome

implementation, strings

String Coloring (hard version)

data structures, dp

For Gamers. By Gamers.

binary search, brute force, greedy, math, sortings

Keep the Average High

dp, greedy, math

Remainder Problem

brute force, data structures, implementation

Binary Number

greedy

A Problem about Polyline

geometry, math

Bayan Bus

implementation

Obtain a Permutation

greedy, implementation, math

Dress'em in Vests!

binary search, brute force, greedy, two pointers

Two Fairs

combinatorics, dfs and similar, dsu, graphs

Absolute Beauty

greedy, math

Do you want a date?

implementation, math, sortings

Restore Permutation

binary search, data structures, greedy, implementation

Divisible by Seven

math, number theory

Lonely Numbers

binary search, math, number theory, two pointers

Border

number theory

Clique Problem

data structures, dp, greedy, implementation, sortings

Ternary Logic

implementation, math

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Count Good Substrings

math

Restaurant

dp, greedy, sortings

Fifa and Fafa

geometry

Bit Guessing Game

binary search, bitmasks, constructive algorithms, interactive

Array Product

constructive algorithms, greedy, math

Easy Assembly

greedy, sortings

Marlin

constructive algorithms

Preparing for Merge Sort

binary search, data structures

Almost Arithmetical Progression

brute force, dp

Petya and Inequiations

greedy

Xor-Paths

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

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers