Statistics on Tree

binary search, brute force, dfs and similar, dfs and similar, divide and conquer, graphs, trees, trees

Building Tree

data structures, divide and conquer, dsu, graphs, graphs, implementation

Unique Values (Easy version)

binary search, constructive algorithms, divide and conquer, interactive, math

Learning Binary Search

combinatorics, divide and conquer, dp, math

Bowser's Castle (Hard Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Bowser's Castle (Medium Version)

constructive algorithms, divide and conquer, interactive, trees, two pointers

Bowser's Castle (Easy Version)

binary search, constructive algorithms, divide and conquer, greedy, interactive, trees

Where's My Water?

data structures, divide and conquer, dp, math

Simons and Beating Peaks

data structures, data structures, divide and conquer, dp, dp, greedy, implementation, trees

Binary Search with One Swap

binary search, divide and conquer, dp, hashing, math, two pointers

Six Seven

divide and conquer, math, number theory, strings, strings, trees

Al Fine (Maximizing Version)

binary search, data structures, divide and conquer, trees

BattleCows

data structures, divide and conquer, implementation

No Effect XOR

bitmasks, divide and conquer, dp, greedy, math

Flatten or Concatenate

binary search, divide and conquer, interactive

Isla's Memory Thresholds

binary search, brute force, data structures, divide and conquer, math

Sliding Tiles

data structures, divide and conquer, dsu

Removal of a Sequence (Hard Version)

binary search, divide and conquer, greedy, implementation, math, number theory

Diadrash (Easy Version)

binary search, brute force, divide and conquer, implementation, interactive

Sink

data structures, divide and conquer, dsu, graphs, implementation

Isaac's Queries

bitmasks, brute force, constructive algorithms, dfs and similar, divide and conquer, dp, greedy, interactive, math, probabilities

Git Gud

brute force, constructive algorithms, divide and conquer, math, ternary search

No Mind To Think

binary search, divide and conquer, greedy, sortings, ternary search, two pointers

Hidden Single (Version 2)

binary search, divide and conquer, interactive, math, probabilities

Hidden Single (Version 1)

divide and conquer, interactive, math, probabilities, sortings

Buratsuta 3

binary search, brute force, data structures, divide and conquer, probabilities

Yet Another MEX Problem

brute force, constructive algorithms, data structures, divide and conquer, greedy, hashing

Max Sum OR (Hard Version)

bitmasks, constructive algorithms, divide and conquer, greedy

Max Sum OR (Easy Version)

bitmasks, constructive algorithms, divide and conquer, greedy, trees

Cost of Coloring

combinatorics, divide and conquer, dp, fft, math

Long Journey

dfs and similar, divide and conquer, dp, graphs, greedy, math, matrices, number theory

Big Wins! (hard version)

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

Timofey and Docker

binary search, divide and conquer, dp

Colorful Polygon

constructive algorithms, divide and conquer, geometry

Traffic Lights

brute force, data structures, divide and conquer, dp, graphs, greedy, shortest paths

Gangsta

data structures, divide and conquer, math, sortings

Incessant Rain

data structures, divide and conquer, sortings

Baudelaire (hard version)

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

Baudelaire (easy version)

binary search, constructive algorithms, divide and conquer, greedy, interactive, trees

Modulo 3

data structures, divide and conquer, dsu, graphs, trees

Quartet Swapping

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

Another Folding Strip

combinatorics, constructive algorithms, data structures, divide and conquer, dp, greedy, math

Counting Necessary Nodes

bitmasks, divide and conquer, greedy, implementation, math

I've Been Flipping Numbers for 300 Years and Calculated the Sum

binary search, brute force, combinatorics, divide and conquer, math, number theory

Friends and Pizza

bitmasks, divide and conquer, dp, fft

Game with Binary String

constructive algorithms, data structures, divide and conquer, games, greedy, math

Graph Inclusion

data structures, dfs and similar, divide and conquer, dsu, graphs

Bro Thinks He's Him

combinatorics, data structures, divide and conquer, dp, math, matrices

Kevin and Nivek

divide and conquer, dp

Unique Median

binary search, brute force, combinatorics, data structures, divide and conquer, dp

Bewitching Stargazer

bitmasks, divide and conquer, dp, math

Maximum modulo equality

data structures, divide and conquer, math, number theory

Kevin and Math Class

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

Vertex Pairs

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

Bottle Arrangement

data structures, divide and conquer, dp, dsu, greedy

Library of Magic

binary search, constructive algorithms, divide and conquer, interactive, math, number theory

Go Learn! (Hard Version)

divide and conquer, dp

Yet Another Real Number Problem

binary search, data structures, divide and conquer, greedy, implementation, math

Bermart Ice Cream

data structures, dfs and similar, divide and conquer, dp, implementation, trees

Complex Segments (Hard Version)

binary search, data structures, divide and conquer, dsu, greedy, math, sortings

Complex Segments (Easy Version)

binary search, data structures, divide and conquer, dsu, greedy, math, sortings

Robin Hood Archery

data structures, divide and conquer, greedy, hashing

Stack and Queue

*special problem, data structures, divide and conquer

Eri and Expanded Sets

data structures, divide and conquer, math, number theory, two pointers

Alter the GCD

binary search, brute force, data structures, divide and conquer, implementation, number theory

Turtle and Inversions (Hard Version)

brute force, data structures, divide and conquer, dp, greedy, math, two pointers

Turtle and Inversions (Easy Version)

brute force, divide and conquer, dp, greedy, math

Guess The Tree

binary search, brute force, dfs and similar, divide and conquer, dsu, greedy, interactive, trees

Eliminating Balls With Merging (Hard Version)

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

Eliminating Balls With Merging (Easy Version)

binary search, brute force, data structures, divide and conquer, greedy

Level Up

binary search, brute force, data structures, divide and conquer, implementation

Polygonal Segments

brute force, data structures, divide and conquer, dp, greedy, two pointers

Catch the Mole(Hard Version)

binary search, data structures, dfs and similar, divide and conquer, interactive, trees

Simultaneous Coloring

dfs and similar, divide and conquer, graphs

Range Minimum Sum

binary search, brute force, data structures, divide and conquer, implementation

Spinning Round (Hard Version)

divide and conquer, dp, trees

Spinning Round (Easy Version)

divide and conquer, dp, trees

Swap Dilemma

constructive algorithms, data structures, divide and conquer, greedy, math, sortings

Number of k-good subarrays

bitmasks, brute force, combinatorics, divide and conquer, dp, math, meet-in-the-middle

Invertible Bracket Sequences

binary search, combinatorics, data structures, divide and conquer, implementation, two pointers

Set

bitmasks, brute force, combinatorics, dfs and similar, divide and conquer, dp, math

Unique Array

binary search, data structures, divide and conquer, dp, greedy

Frequency Mismatch (Easy Version)

binary search, data structures, divide and conquer, hashing, probabilities, trees

Nene and the Mex Operator

bitmasks, brute force, constructive algorithms, divide and conquer, dp, greedy, implementation, math

No Palindromes

brute force, constructive algorithms, divide and conquer, greedy, hashing, implementation, math, strings

Burenka and Pether

*special problem, data structures, dfs and similar, divide and conquer, dsu, graphs, sortings, trees

Yet Yet Another Permutation Problem

divide and conquer, fft, math

Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Increasing Subsequences

bitmasks, constructive algorithms, divide and conquer, greedy, math

Mischievous Shooter

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

Tree LGM

constructive algorithms, divide and conquer, games, trees

ace5 and Task Order

constructive algorithms, divide and conquer, implementation, interactive, probabilities, sortings

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Greetings

data structures, divide and conquer, sortings

Array Collapse

data structures, divide and conquer, dp, trees

Blueprint for Seating

combinatorics, divide and conquer, math

Deck-Building Game

divide and conquer, math

Field Should Not Be Empty

brute force, data structures, divide and conquer

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy