Deque Malfunction

binary search, data structures, dp, greedy

Modular Tree

dfs and similar, dp, greedy, math, number theory, trees

MEX Replacement

binary search, brute force, greedy, implementation, math, sortings

Prime Destruction

dp, math, number theory

Falling Concrete

constructive algorithms, data structures, math, sortings

AND, OR, Sort!

greedy, strings

Three Piles

games, greedy, math

Good Contest

greedy

Deranged Calculator

constructive algorithms, implementation, math

A Prime Flood (Hard Version)

brute force, combinatorics, combinatorics, combinatorics, dp, dp, number theory, number theory

A Prime Flood (Easy Version)

combinatorics, dp, number theory

Dr. Agos's Dark Mode

brute force, chinese remainder theorem, constructive algorithms, math, strings

Madamant's Skating Dynasty

combinatorics, math, sortings

Knife's Pill Farm

data structures, greedy, math

Rumb Needs a Hand

implementation, implementation, implementation, sortings, sortings, sortings, two pointers, two pointers, two pointers

Min Matrices

constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms, constructive algorithms

Min Max Game

games

Rank Removal

math

Paired Bracket Sequences

combinatorics, math

PLUSworld

constructive algorithms, graphs, greedy

Traveling the World

combinatorics, constructive algorithms, graphs, greedy, math

Culling Game

binary search, data structures, implementation, two pointers

Floor of MEX (Hard Version)

dp, implementation, math

Floor of MEX (Easy Version)

constructive algorithms, greedy

Sortable Permutations

brute force, combinatorics, math, number theory

Edge Three-Coloring

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

Cyclic Balance

binary search, constructive algorithms, dp, math

Signs of Prefix Sums

brute force, constructive algorithms, dfs and similar, dp, implementation

Maximize XOR, Minimize Operations

bitmasks, greedy

Monocarp and Projects

brute force, math, number theory

Monocarp's Contest

implementation

Treasure Map Destruction (Counting Version)

dfs and similar, dp, dsu, graphs, math

Index Removal

binary search, data structures, math

Binary Bubble Sort Inversions

data structures, math, two pointers

Treasure Map Destruction (Constructive Version)

2-sat, constructive algorithms, constructive algorithms, greedy, greedy

MEX Multiset

constructive algorithms, greedy

101

constructive algorithms, greedy

Minus Two

math, number theory, number theory, number theory, number theory, number theory

Moo Language School

brute force, greedy, greedy, greedy, greedy, two pointers

Plus Minus Tree

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

DivMEX

data structures, math, math, number theory

Magic Tiles

dp, greedy, implementation

Far Cities

interactive, trees, two pointers

Carrot Chopdown (Hard Version)

brute force, greedy, implementation, math

Carrot Chopdown (Easy Version)

brute force, games, math

Odd Eraser

math

Beaver's Jumping Track (Hard Version)

data structures, dp, matrices

Beaver's Jumping Track (Easy Version)

data structures, dp, matrices

Busy Beaver

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

Bermuda Rectangle

binary search, implementation, math, number theory, two pointers

Spying on the Beaver

constructive algorithms, dfs and similar, dsu, graphs, trees

Gigantomachy

math, math

Creating Abbreviations

brute force, strings

Domino Tiles

implementation, math

Three Numbers on the Blackboard

math, math, math, math, sortings

Who Will Witness the End?

fft, math, math

What Will Remain at the End? (Hard Version)

data structures

What Will Remain at the End? (Easy Version)

brute force, data structures, data structures

How Long Until Nothing Remains?

binary search, bitmasks, data structures, greedy, math, sortings

Even If the World Turns

communication, constructive algorithms, expression parsing, greedy, interactive, math, number theory

A Ribbon for Tomorrow

combinatorics, math

Hot Potatoes at the Fairy Warehouse

games, greedy, implementation

Nightcrawler

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

Whiplash

bitmasks, constructive algorithms, math, sortings

Chronostasis

binary search, data structures, greedy

Silhouette

constructive algorithms, math, sortings

Marenol (hard version)

greedy, sortings

Marenol (easy version)

greedy

Evanescent

implementation, strings, two pointers

Riptide

implementation, sortings

4-beauty

bitmasks, dp, graphs, math, number theory

Diameter Intersections

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

Hypercarp and Interdimensional Jumps

binary search, brute force, geometry, greedy, implementation, math

Sum of Distinct Values in a Matrix

greedy, sortings, two pointers

Hypercarp and the Control Panel

brute force, data structures, two pointers

The Best Card

greedy, math, number theory

Spectral Components

dfs and similar, dp, dp, greedy, sortings, trees

Generational Triplets

bitmasks, combinatorics, dp, math

Array Replacement

greedy, sortings

Risky Tower

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

Always Changing

dp, greedy, math, strings

Boss Fight

data structures, greedy, greedy

String Construction

constructive algorithms, constructive algorithms

Threshold Movement

brute force, implementation, math

Even Simple Path

constructive algorithms, graphs, shortest paths

String (Hard Version)

divide and conquer, implementation, strings

String (Easy Version)

divide and conquer, implementation, strings

Xor Permutation Matrix

bitmasks, constructive algorithms, math

Double-Rift Dial

data structures, dfs and similar, dsu, implementation, two pointers

Permutation Cuts

combinatorics, implementation, math

Rank Subsequence

brute force, greedy, implementation

No Balance Left

bitmasks, dp, math, number theory

Matrix Elimination

binary search, greedy, math

Excuse for Breaks

binary search, brute force, greedy, math, two pointers

Good Pair Queries

constructive algorithms, greedy, math

Maximize the Score

dp, greedy

Merge to Match

greedy, sortings

You Delete, I Delete

greedy

Paths on a Grid

data structures, dp, hashing

Build a Tree

constructive algorithms, trees, two pointers