A Problem to Warm Up the Eyebrows

combinatorics, combinatorics, dp, dp, math, math

Copper Squander

binary search, data structures, dsu, graphs, greedy, math, sortings, ternary search

Tea Blend

hashing, math, number theory

Repentance Is Already on the Way

dp, implementation

Precision Alignment

binary search, brute force, greedy, implementation

Unrequited Love

brute force, data structures

Did Not Go to Print

data structures, implementation

In Search of Convenience

geometry, implementation

Prefix

greedy

The Projections of Paco

implementation, math

Pancho's Permutation

constructive algorithms, dp, greedy, math

Six-Seven Bags

brute force, greedy, interactive

Aura Battle

brute force, implementation, interactive, math

Matrix Puzzle

data structures, implementation, math, matrices

Robot Championship

constructive algorithms, math

Lavencia Oranges

binary search, constructive algorithms, dp, greedy

Personal Issues (Hard Version)

games, games, trees, trees

Personal Issues (Easy Version)

dp, games, games, trees, trees

Grid Filling

constructive algorithms, constructive algorithms, greedy, greedy, implementation, implementation

Beautiful Pillers

constructive algorithms, constructive algorithms, data structures, dp, greedy, implementation

Array Emptying

binary search, binary search, greedy, greedy

Target Infection

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

XOR Problem

constructive algorithms, graphs, greedy, math

MEX Game

games

Robot Odd Moves

constructive algorithms, math

KiaKio and Squared Numbers

brute force, implementation

SauSaGe Bank

greedy, math

Deglado

constructive algorithms

Kia Kio and Tree of Life

data structures, fft, math, trees

AghaBalaSar and Hamed

data structures, dp, trees

KiaKio and Energy Intervals

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

What a SauSaGe! It's All Meat

bitmasks, brute force, data structures, math

K Is Important

constructive algorithms, greedy

New LRT

divide and conquer, dp, fft

XOR Transformations (Hard Version)

bitmasks, brute force, data structures, dfs and similar, greedy, math, sortings, strings, trees

XOR Transformations (Easy Version)

bitmasks, brute force, implementation, sortings

Clean Substrings

combinatorics, data structures, math

Backrooms Hill

constructive algorithms, dp, greedy, sortings, two pointers

GCD Treasury

greedy, math, number theory

Fashionable Array

brute force, constructive algorithms, sortings

Turn Into a Palindrome

greedy, strings

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

brute force, 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