Make it Zero

constructive algorithms, greedy, math

Modular Sorting

brute force, data structures, greedy, math, number theory, sortings

Gangsta

data structures, divide and conquer, math, sortings

Token Removing

combinatorics, dp, math

Omg Graph

brute force, dsu, graphs, greedy, shortest paths, sortings

Gellyfish and Camellia Japonica

brute force, constructive algorithms, dfs and similar, dp, graphs, greedy, trees

Small Operations

binary search, brute force, dfs and similar, dp, math, number theory, sortings

Changing the String

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

D/D/D

dfs and similar, graphs, greedy, shortest paths

Apple Tree Traversing

brute force, dfs and similar, greedy, implementation, trees

Goblin

dfs and similar, dp, dsu, greedy, math

Local Construction

constructive algorithms, dfs and similar, implementation, two pointers

Wonderful Lightbulbs

combinatorics, constructive algorithms, math

La Vaca Saturno Saturnita

binary search, brute force, math, number theory

Shorten the Array

binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers

She knows...

combinatorics, constructive algorithms, graphs, math

Canteen (Easy Version)

binary search, data structures, flows, greedy, two pointers

Serval and Kaitenzushi Buffet

data structures, graph matchings, greedy

Finding OR Sum

bitmasks, constructive algorithms, implementation, interactive, math

Equalization

bitmasks, brute force, dp, graphs, math

Game With Triangles: Season 2

dp, geometry

Counting Necessary Nodes

bitmasks, divide and conquer, greedy, implementation, math

Gathering Sharks

Control Towers

The Ultimate Wine Tasting Event

combinatorics, greedy

Mascot Naming

brute force, greedy, implementation, strings

Ads

binary search, greedy, two pointers

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Eating

binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers

Game With Triangles

binary search, brute force, data structures, geometry, greedy, implementation, math, ternary search, two pointers

The Game (Easy Version)

data structures, dfs and similar, games, graphs, greedy, trees

Kevin and Binary String (Easy Version)

greedy, implementation

Kevin and And

bitmasks, brute force, dp, greedy, math, sortings

Graph and Graph

data structures, graphs, greedy, shortest paths

Gifts Order

data structures, greedy, implementation, math, matrices

Scarecrow

greedy, implementation, math

Resourceful Caterpillar Sequence

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

Judicious Watching

binary search, greedy, sortings

Expression Correction

brute force, expression parsing, strings

DAG Serialization

brute force, graphs

Snakes

bitmasks, dp, dsu, graphs

Joker

brute force, greedy, implementation, math

Tree Destruction

dfs and similar, dp, trees

Shift + Esc

brute force, dp

Kevin and Bipartite Graph

constructive algorithms, graphs, greedy

Adventurers

binary search, data structures, greedy, sortings, ternary search, two pointers

Microwavable Subsequence

data structures

ICPC Square

math, number theory

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

Medium Demon Problem (hard version)

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

Easy Demon Problem

binary search, brute force, data structures, math, number theory

Recommendations

data structures, implementation, sortings, two pointers

Selection Sort

binary search, data structures, greedy, two pointers

Cube

bitmasks, dfs and similar, dp

Control of Randomness

combinatorics, dfs and similar, dp, graphs, greedy, math, probabilities, trees

Non Prime Tree

brute force, constructive algorithms, dfs and similar, greedy, number theory, trees, two pointers

Grid Walk

brute force, dp, greedy, math, number theory

Guess One Character

constructive algorithms, implementation, interactive

Make It Equal

binary search, brute force, greedy, math

Natlan Exploring

bitmasks, combinatorics, data structures, dp, math, number theory

Ardent Flames

binary search, data structures, math, sortings, two pointers

XORificator 3000

bitmasks, dp, number theory, two pointers

Penchick and Chloe's Trees

data structures, dfs and similar, dp, greedy, implementation, math, sortings, trees

Common Generator

brute force, constructive algorithms, math, number theory

Cool Graph

constructive algorithms, data structures, dfs and similar, dsu, graphs, greedy, trees

Alice's Adventures in Cards

constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search

Sums of Segments

binary search, data structures, dp, implementation, math

Asesino (Easy Version)

binary search, brute force, constructive algorithms, implementation, interactive

Adjust The Presentation (Hard Version)

constructive algorithms, data structures, greedy, implementation, sortings

Expected Power

bitmasks, dp, math, probabilities

Speedbreaker

binary search, data structures, dp, greedy, implementation, two pointers

Robin Hood Archery

data structures, divide and conquer, greedy, hashing

Sheriff's Defense

dfs and similar, dp, greedy, trees

Minimize the Difference

binary search, greedy

Yunli's Subarray Queries (easy version)

binary search, data structures, two pointers

Sakurako's Test

binary search, brute force, greedy, math, number theory

Subtangle Game (Easy Version)

dp, games, greedy, implementation

Not a Nim Problem

brute force, games, math, number theory

Turtle and a MEX Problem (Hard Version)

dfs and similar, dp, graphs, greedy, implementation, math

DFS Checker (Easy Version)

brute force, data structures, dfs and similar, graphs, hashing, trees

Longest Max Min Subsequence

brute force, constructive algorithms, data structures, greedy, implementation

Call During the Journey

binary search, brute force, graphs, greedy, shortest paths

Color Rows and Columns

dp, greedy, implementation, math

Determine Winning Islands in Race

data structures, dp, graphs, greedy, shortest paths

Perform Operations to Maximize Score

binary search, brute force, constructive algorithms, greedy, implementation

Bomb

binary search, greedy, math

Wooden Game

bitmasks, greedy, math, trees

Funny Game

constructive algorithms, dsu, graphs, greedy, math, number theory, trees

Ultra-Meow

combinatorics, dp, math

Valuable Cards

brute force, dp, greedy, number theory, two pointers

Coloring Game

constructive algorithms, dfs and similar, games, graphs, greedy, interactive

Prime XOR Coloring

bitmasks, constructive algorithms, graphs, greedy, math, number theory

Smithing Skill

brute force, data structures, dp, greedy, math, sortings, two pointers

The Omnipotent Monster Killer

brute force, dfs and similar, dp, trees

Wonderful Tree!

brute force, data structures, dfs and similar, dsu, greedy, trees

Non-academic Problem

dfs and similar, graphs, trees

''a'' String Problem

brute force, hashing, implementation, math, string suffix structures, strings

Field Division (easy version)

data structures, math, sortings

Computing Machine

brute force, data structures, dp, greedy, implementation

Nikita and LCM

brute force, data structures, dp, greedy, math, number theory, sortings