Spruce Dispute

constructive algorithms, dfs and similar, graphs, greedy, implementation, shortest paths, trees

Needle in a Numstack

binary search, brute force, implementation, interactive

Neo's Escape

binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation

SUMdamental Decomposition

bitmasks, constructive algorithms, greedy, implementation, math

Apple Tree Traversing

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

Maximum Subarray Sum

binary search, constructive algorithms, dp, implementation, math

Baudelaire (hard version)

binary search, dfs and similar, divide and conquer, implementation, interactive, trees

Numbers and Strings

binary search, brute force, dfs and similar, dp, implementation, math

Move to the End

brute force, data structures, dp, greedy, implementation

Maximize Nor

bitmasks, data structures, dp, implementation, sortings

Keep the Sum

constructive algorithms, implementation, two pointers

Local Construction

constructive algorithms, dfs and similar, implementation, two pointers

Median Splits

binary search, greedy, implementation, sortings

Common Multiple

brute force, greedy, implementation, math

The Picky Cat

implementation, sortings

Mani and Segments

data structures, implementation, sortings, two pointers

Mex in the Grid

constructive algorithms, implementation

Bermuda Triangle

chinese remainder theorem, geometry, implementation, math, number theory

Baggage Claim

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

Wonderful Impostors

data structures, implementation, two pointers

Wonderful Teddy Bears

greedy, implementation, sortings

Wonderful City

dp, implementation

Chimpanzini Bananini

data structures, implementation, math

Skibidi Table

bitmasks, implementation

Mishkin Energizer

brute force, constructive algorithms, greedy, implementation, strings

Lady Bug

brute force, constructive algorithms, implementation, math

Dining Hall

data structures, greedy, implementation, sortings

Pushing Balls

brute force, dp, implementation

Treasure Hunt

implementation, math

Disappearing Permutation

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

Serval and Final MEX

constructive algorithms, implementation

Serval and String Theory

constructive algorithms, implementation

Blossom

binary search, combinatorics, dp, implementation, math, two pointers

You Soared Afar With Grace

constructive algorithms, data structures, greedy, implementation

Quantifier

combinatorics, dp, implementation

Quaternary Matrix

bitmasks, constructive algorithms, greedy, implementation, matrices

Scammy Game Ad

dp, greedy, implementation

Vicious Labyrinth

constructive algorithms, graphs, greedy, implementation, math

Maximum Polygon

brute force, data structures, greedy, implementation, math

Finding OR Sum

bitmasks, constructive algorithms, implementation, interactive, math

Beautiful Sequence Returns

binary search, brute force, data structures, implementation

XOR Matrix

bitmasks, combinatorics, dp, implementation, math

Counting Necessary Nodes

bitmasks, divide and conquer, greedy, implementation, math

Counting Points

brute force, data structures, geometry, implementation, two pointers

Draw a Square

geometry, implementation

For Wizards, the Exam Is Easy, but I Couldn't Handle It

brute force, greedy, implementation

New World, New Me, New Array

greedy, implementation, math

Infinite Sequence (Hard Version)

bitmasks, brute force, constructive algorithms, data structures, dp, implementation, math

Infinite Sequence (Easy Version)

bitmasks, brute force, dp, implementation, math

Robot Program

brute force, implementation, math

Mascot Naming

brute force, greedy, implementation, strings

Tropical Season

binary search, data structures, greedy, implementation

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Object Identification

graphs, greedy, implementation, interactive

Skibidus and Amog'u

brute force, constructive algorithms, greedy, implementation, strings

Counting Is Not Fun (Hard Version)

combinatorics, data structures, dfs and similar, dsu, graphs, implementation, trees

Counting Is Not Fun (Easy Version)

combinatorics, data structures, dfs and similar, dp, dsu, graphs, hashing, implementation, math, trees

Game With Triangles

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

The Game (Hard Version)

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

Kevin and Binary String (Easy Version)

greedy, implementation

Gifts Order

data structures, greedy, implementation, math, matrices

Find the Permutation

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

Scarecrow

greedy, implementation, math

Delicate Anti-monotonous Operations

constructive algorithms, implementation

Earnest Matrix Complement

brute force, data structures, dp, greedy, implementation, math

Geometric Balance

data structures, geometry, implementation

Joker

brute force, greedy, implementation, math

Preparing for the Exam

constructive algorithms, implementation

Three Strings

dp, implementation, strings

Line Breaks

implementation

MEX OR Mania

bitmasks, brute force, data structures, dsu, implementation

Broken Queries

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

MEX Cycle

brute force, constructive algorithms, greedy, implementation

pspspsps

brute force, constructive algorithms, graph matchings, implementation

MEX Destruction

greedy, implementation

Kevin and Math Class

brute force, data structures, divide and conquer, dp, implementation, math, trees

Kevin and Binary Strings

bitmasks, brute force, greedy, implementation, strings

Kevin and Combination Lock

brute force, greedy, implementation, math, number theory

Alyona and a Square Jigsaw Puzzle

implementation, math

Yandex Cuneiform (Hard Version)

constructive algorithms, data structures, greedy, implementation

Cheops and a Contest (Hard Version)

greedy, implementation

Mirror Maze

brute force, dfs and similar, graphs, implementation

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

Medium Demon Problem (hard version)

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

Medium Demon Problem (easy version)

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

Insane Problem

binary search, greedy, implementation, math, number theory

Normal Problem

implementation, strings

Problem with Queries

brute force, data structures, implementation

Nim

bitmasks, brute force, combinatorics, dp, games, greedy, implementation, shortest paths

Matrix Transformation

bitmasks, brute force, data structures, dfs and similar, graphs, greedy, implementation

Two Subarrays

data structures, dp, implementation, matrices

Vertex Pairs

binary search, brute force, data structures, dfs and similar, divide and conquer, greedy, implementation, trees

Recommendations

data structures, implementation, sortings, two pointers

Auto Complete

binary search, data structures, hashing, implementation, sortings, strings, trees

The Bento Box Adventure

implementation, sortings

Cool Swap Walk (Hard Version)

constructive algorithms, constructive algorithms, constructive algorithms, implementation, sortings

Cool Swap Walk (Easy Version)

constructive algorithms, implementation, sortings

Shohag Loves Inversions

combinatorics, dp, implementation, math

Shohag Loves Strings

constructive algorithms, greedy, implementation, strings

Fixing the Expression

implementation