To Make 1

bitmasks, constructive algorithms, dp, greedy, number theory

Rock Is Push

binary search, dp

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Paint the Tree

dp, sortings, trees

Sequence Sorting

dp, greedy, two pointers

Graph And Numbers

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

Make The Fence Great Again

dp

Tourism

dfs and similar, dp, dsu, graphs, greedy, trees

Jumping Transformers

dp

BubbleReactor

dp, graphs

Wi-Fi

data structures, dp, greedy

Marbles

bitmasks, dp

The Number of Products

combinatorics, dp, implementation

Treasure Island

dfs and similar, dp, flows, hashing

Road Repair in Treeland

*special problem, binary search, dp, trees

Mateusz and Escape Room

dp

Rotate Columns (hard version)

bitmasks, dp, greedy, sortings

Rotate Columns (easy version)

bitmasks, brute force, dp, greedy, sortings

Bits And Pieces

bitmasks, dfs and similar, dp, greedy

Gas Pipeline

dp, greedy

Make Product Equal One

dp, implementation

Natasha, Sasha and the Prefix Sums

combinatorics, dp, math, number theory

Anna, Svyatoslav and Maps

dp, graphs, greedy, shortest paths

Complete the Projects (hard version)

dp, greedy

You Are Given a WASD-string...

brute force, data structures, dp, greedy, implementation, math, strings

You Are Given a Decimal String...

brute force, dp, shortest paths

Treasure Hunting

binary search, dp, greedy, implementation

Graph Traveler

brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

White Lines

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

Block Adventure

dp, greedy

Rectangle Painting 1

dp

Coloring Game

dp, games, matrices

Culture Code

binary search, combinatorics, data structures, dp, shortest paths, sortings

Yet Another Subarray Problem

dp, greedy, math

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Basketball Exercise

dp

Another Meme Problem

dp

Crossword Expert

combinatorics, dp, number theory, probabilities, two pointers

Magic Tree

*special problem, data structures, dp, trees

Amusement Park

*special problem, dp, math

Cubeword

*special problem, brute force, dp, meet-in-the-middle

Candies!

data structures, dp, implementation, math

Make Equal

dp

Array Beauty

dp

Expected Square Beauty

dp, math, probabilities

Tree Painting

dfs and similar, dp, trees

Playlist for Polycarp (hard version)

combinatorics, dp

Playlist for Polycarp (easy version)

bitmasks, combinatorics, dp

Subsequences (hard version)

dp, strings

Subsequences (easy version)

dp, graphs, implementation, shortest paths

Product Oriented Recurrence

dp, math, matrices, number theory

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

Filling Shapes

dp, math

Flag

brute force, combinatorics, dp, implementation

Alex and a Rhombus

dp, implementation, math

Fedor Runs for President

data structures, dp, trees

Long Colorful Strip

dp

Short Colorful Strip

combinatorics, dfs and similar, dp

WOW Factor

dp, strings

Destroy it!

dp, implementation, sortings

Lose it!

dp, greedy, implementation

Yet Another Partiton Problem

data structures, divide and conquer, dp, geometry, two pointers

Minimal Segment Cover

data structures, dfs and similar, divide and conquer, dp, greedy, implementation, trees

Ehab and the Expected GCD Problem

combinatorics, dp, math, number theory

Nauuo and Pictures (hard version)

dp, probabilities

Nauuo and Pictures (easy version)

dp, probabilities

Nauuo and Circle

combinatorics, dfs and similar, dp, trees

Good Subsets

*special problem, dp

Anagram Paths

dp, implementation, trees

And Reachability

bitmasks, dp

Mysterious Code

dp, strings

Density of subarrays

dp, math

Maximum Balanced Circle

constructive algorithms, dp, greedy, two pointers

Card Bag

dp, math, probabilities

0-1-Tree

dfs and similar, divide and conquer, dp, dsu, trees

Delivery Oligopoly

brute force, dp, graphs

Beautiful Array

brute force, data structures, divide and conquer, dp, greedy

Shovels Shop

dp, greedy, sortings

Serval and Bonus Problem

combinatorics, dp, math, probabilities

Serval and Rooted Tree

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

Neko Rules the Catniverse (Large Version)

bitmasks, dp, matrices

Neko Rules the Catniverse (Small Version)

bitmasks, dp, matrices

Neko and Aki's Prank

dp, greedy, trees

Sonya and Informatics

combinatorics, dp, matrices, probabilities

Number of Components

combinatorics, data structures, dp, math

Dima and a Bad XOR

bitmasks, brute force, constructive algorithms, dp

Abandoning Roads

brute force, dp, graphs, greedy

Three Religions

dp, implementation, strings

Satanic Panic

dp, geometry

Zoning Restrictions

dp, flows, graphs

Leaf Partition

dp, trees

Two Merged Sequences

dp, greedy

Foreigner

dp

Lynyrd Skynyrd

data structures, dfs and similar, dp, math, trees

Palindrome-less Arrays

combinatorics, divide and conquer, dp

Minimum Triangulation

dp, greedy, math

Steps to One

dp, math, number theory, probabilities

Museums Tour

dp, graphs, implementation

K Balanced Teams

dp, sortings, two pointers

Greedy Subsequences

data structures, dp, trees