Minecraft Series

brute force, two pointers

School Clubs

dp, fft, math, number theory, probabilities

Cacti Symphony

combinatorics, dfs and similar, dp, graphs

Entangled Substrings

string suffix structures, strings

Growing flowers

data structures

Epic Convolution

chinese remainder theorem, fft, math, number theory

Tree LGM

constructive algorithms, divide and conquer, games, trees

A Convex Game

dsu, games

Trains and Airplanes

dfs and similar, graphs, shortest paths, trees

Cursor Distance

Omkar and Mosaic

combinatorics, constructive algorithms, math

Mateusz and Escape Room

dp

Maximum Product?

brute force, combinatorics, dp, greedy, implementation, math, two pointers

Jellyfish and OEIS

dp

Blocks and Sensors

brute force

Alphabetic Tree

binary search, data structures, dfs and similar, hashing, string suffix structures, strings, trees

BubbleSquare Tokens

Bugaboo

bitmasks, constructive algorithms, dp, number theory

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

The Ultimate LIS Problem

data structures, greedy

Red Blue Tree

data structures, implementation, trees

Good Graph

bitmasks, dfs and similar, graph matchings, graphs, implementation

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Olympic Team Building

brute force, meet-in-the-middle

Finding the Vertex

brute force, dfs and similar, dp, interactive, trees

Dušan's Railway

divide and conquer, graphs, trees

Maximum Permutation

constructive algorithms

Boboniu and Banknote Collection

strings

Willy-nilly, Crack, Into Release!

data structures, dp

LuoTianyi and Cartridge

data structures, trees

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Nezzar and Chocolate Bars

combinatorics, fft, math, probabilities

Balanced Distribution

data structures, dp, greedy

Clubstep

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

Optimal Encoding

brute force, data structures

Strange Covering

divide and conquer

Mark and Spaceship

brute force, dp

Kuroni the Private Tutor

binary search, greedy

Ela Takes Dancing Class

binary search, data structures

Two Sequences

data structures, hashing, string suffix structures

Tenzing and Necklace

divide and conquer, dp, greedy

Slime and Sequences (Hard Version)

dp, fft, math

Cut the pie

binary search, data structures, geometry

Copium Permutation

constructive algorithms, data structures, greedy

Indefinite Clownfish

binary search, graphs

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

Impressionism

constructive algorithms, graphs, implementation, math

Permutation Weight (Hard Version)

constructive algorithms, greedy

Two Avenues

data structures, dfs and similar, graphs

AquaMoon and Potatoes

brute force, data structures, dp

Tasty Dishes

math, matrices

Panda Meetups

data structures, dp, flows

Palindromic Magic

data structures, hashing, strings

Mio and Lucky Array

constructive algorithms, fft, math, strings

Centroid Guess

interactive, probabilities, trees

Covering Circle

geometry

Neighbour Ordering

constructive algorithms, graphs

Yin Yang

implementation

Rain Protection

binary search, geometry

Koxia, Mahiru and Winter Festival

constructive algorithms

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Assigning Fares

dp, trees

Window Signals (hard version)

Pushing Robots

Rotary Laser Lock

binary search, interactive

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Tokitsukaze and Gems

dp, math

Doremy's Swapping Trees

dfs and similar, graphs, trees

Spaceship Crisis Management

binary search, data structures, geometry, sortings

Future Dominators

graphs, greedy

Slime and Hats

constructive algorithms, dp, greedy

Mainak and the Bleeding Polygon

binary search, geometry, implementation, math

AquaMoon and Time Stop (hard version)

data structures, dp

Four Stones

constructive algorithms

Standard Graph Problem

data structures, graphs, greedy, trees

Koishi's Unconscious Permutation

fft, math

Anti-median (Hard Version)

combinatorics, dp, math

Long Recovery

constructive algorithms, dfs and similar

Cubic Lattice

geometry, math, matrices, number theory

Game of AI (hard version)

combinatorics, fft, math

Jellyfish Nightmare

AquaMoon and Time Stop (easy version)

data structures, dp

Ruler Of The Zoo

brute force, data structures

Minimum Hamming Distance

dp

Min-Sum-Max

constructive algorithms, dp, greedy

BinaryStringForces

constructive algorithms, data structures, dp

Jellyfish and Inscryption

dp

Goldberg Machine 3

dp, trees

Spiderweb Trees

dp, geometry, trees

Redundant Routes

constructive algorithms, dp, trees

Three Minimums

combinatorics, constructive algorithms, divide and conquer, dp, fft, math

Prison Break

binary search, games, geometry, ternary search

Doremy's Average Tree

data structures, dp, greedy, trees

LIS?

data structures, greedy, implementation

Wakanda Forever

Count Permutations

math

Fly Around the World

dp, geometry

Crossing the Railways

data structures, dp

Heroes of Might

math