Sorting with Twos

constructive algorithms, sortings

Qingshan Loves Strings

constructive algorithms, implementation

Doremy's Paint 3

constructive algorithms

Doremy's Average Tree

data structures, dp, greedy, trees

Doremy's Swapping Trees

dfs and similar, graphs, trees

Game of Stacks

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

Doremy's Drying Plan (Hard Version)

data structures, dp

Doremy's Drying Plan (Easy Version)

brute force, data structures, dp, greedy, sortings

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Minimum Segments

constructive algorithms

Good Colorings

binary search, constructive algorithms, graphs, interactive

Split

binary search, data structures, divide and conquer, dsu, math, trees, two pointers

Minimum Array

binary search, brute force, constructive algorithms, data structures, greedy, hashing, two pointers

Time Travel

binary search, graphs, shortest paths

Diamond Theft

data structures, greedy

I Wanna be the Team Leader

bitmasks, constructive algorithms, dp, greedy, math, sortings, two pointers

Monocarp and the Set

combinatorics, data structures, math

Decreasing String

implementation, strings

Fear of the Dark

binary search, geometry, math

Sum of Three

brute force, constructive algorithms, math

Deterministic Scheduling for Extended Reality over 5G and Beyond

*special problem

Hard Design

greedy, implementation, math

Counting Rhyme

dp, math, number theory

Medium Design

brute force, data structures, dp, greedy, sortings

Haunted House

binary search, greedy, math, two pointers

Simple Design

brute force, greedy, math

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Dances (Easy version)

binary search, greedy, two pointers

You Are So Beautiful

data structures

Look Back

bitmasks, greedy

In Love

data structures, greedy

Raspberries

dp, math

Chemistry

strings

Morning

math

Two Permutations (Hard Version)

constructive algorithms

Two Permutations (Easy Version)

brute force, constructive algorithms, greedy, number theory

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Card Game

brute force, greedy

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Increasing Sequence

greedy

Anya and the Mysterious String

binary search, data structures

Minimum Maximum Distance

dfs and similar, dp, graphs, shortest paths, trees

Block Sequence

dp

Divide and Equalize

math, number theory

Perfect Square

brute force, implementation

Three Threadlets

math

Don't Try to Count

brute force, strings

Last Man Standing

brute force, data structures, number theory

Interactive Game with Coloring

brute force, constructive algorithms, dfs and similar, graphs, implementation, interactive, trees

Sum of XOR Functions

bitmasks, combinatorics, divide and conquer, dp, math

Make it Alternating

combinatorics, dp, greedy

Chips on the Board

constructive algorithms, greedy

Rigged!

greedy

wxhtzdy ORO Tree

binary search, bitmasks, brute force, data structures, dfs and similar, implementation, trees

Vasilije Loves Number Theory

brute force, math, number theory

Iva & Pav

binary search, bitmasks, data structures, greedy

Reverse Madness

data structures, greedy

Vasilije in Cacak

math

Aleksa and Stack

constructive algorithms, math

How Much Does Daytona Cost?

greedy

Joyboard

math, number theory

Goals of Victory

math

Clubstep

binary search, brute force, data structures, greedy, trees

Indefinite Clownfish

binary search, graphs

Ball-Stackable

constructive algorithms, data structures, dp, trees

Lexichromatography

combinatorics, dfs and similar, dsu, graphs, two pointers

Autosynthesis

constructive algorithms, dfs and similar, graphs, greedy, sortings

Effects of Anti Pimples

combinatorics, number theory, sortings

Helmets in Night Light

greedy, sortings

Jellyfish and Mex

dp

Jellyfish and Green Apple

bitmasks, greedy, math, number theory

Jellyfish and Undertale

brute force, greedy

Jellyfish and Inscryption

dp

Jellyfish and OEIS

dp

Jellyfish and Hack

dp, math

Jellyfish and Miku

divide and conquer, dp, math, probabilities

Jellyfish and EVA

dp, graphs, greedy, math, probabilities

Jellyfish and Math

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

Jellyfish and Game

brute force, games, greedy, implementation

Mad City

dfs and similar, dsu, games, graphs, shortest paths, trees

ABBC or BACB

constructive algorithms, greedy

Money Trees

binary search, greedy, math, two pointers

Building an Aquarium

binary search, sortings

1D Eraser

greedy, implementation, two pointers

Target Practice

implementation, math

Good Kid

brute force, greedy, math

Short Sort

brute force, implementation

Replace With Product

brute force, greedy, math

Selling a Menagerie

dfs and similar, dsu, graphs, implementation, math

Data Structures Fan

binary search, bitmasks, data structures, dp

Plus Minus Permutation

math

Non-coprime Split

math, number theory

The Corridor or There and Back Again

greedy, implementation

Two Vessels

brute force, greedy, math

Standard Graph Problem

data structures, graphs, greedy, trees

MEXanization

data structures

Lazy Numbers

binary search, math

Another MEX Problem

bitmasks, brute force, dp, shortest paths

Prefix Purchase

greedy, implementation, sortings