Beaver's Jumping Track (Hard Version)

data structures, dp, matrices

What Will Remain at the End? (Hard Version)

data structures

What Will Remain at the End? (Easy Version)

brute force, data structures, data structures

Paths on a Grid

data structures, dp, hashing

Connect Connect See

brute force, brute force, data structures

Summer Vacation

data structures, data structures, data structures, dp, dp, probabilities, trees

The end of this world,

data structures, divide and conquer, dsu, graphs

Slime and Queries

data structures, greedy, trees

Stripe, Token and Two Players

data structures, dp, games

Roadworks

binary search, data structures, dp, greedy, two pointers

Zhily and Permutation

data structures, divide and conquer, trees

MEX Replacement on Tree

data structures, implementation, math, trees

Star Map

constructive algorithms, data structures, geometry, greedy, sortings

A Simple Problem

binary search, data structures, greedy, math, trees

Dynamic Values And Maximum Sum

data structures, data structures, greedy, implementation, trees

Hanabi

binary search, data structures, dp, dsu, flows, graph matchings, graphs, greedy

Simons and Diophantus Equation

bitmasks, brute force, data structures, math, number theory

Monotone Monochrome Matrices (Hard Version)

constructive algorithms, data structures, hashing, math

Monotone Monochrome Matrices (Medium Version)

data structures, hashing

Fuzzy Concatenation (Hard version)

binary search, bitmasks, data structures, dp, greedy, string suffix structures

Fuzzy Concatenation (Easy Version)

binary search, bitmasks, brute force, data structures, greedy, string suffix structures

Again Trees... (hard version)

bitmasks, data structures, dfs and similar, dp, fft, trees

Zhora the Vacuum Cleaner

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

Al Fine (Maximizing Version)

binary search, data structures, divide and conquer, trees

Doors and Keys

brute force, data structures, dp

Short Garland

combinatorics, data structures, dfs and similar, dp, trees

deCH OR Dations

bitmasks, data structures, dp, hashing, probabilities

Secret Message

data structures, dp, greedy, trees

Arctic Acquisition

data structures, greedy

PalindromePalindrome

data structures, strings

Chain Prefix Rank (Hard Version)

binary search, combinatorics, data structures, dfs and similar, dp, graphs, math, trees

Cycle Sort

data structures

Strange Operation (Hard Version)

data structures, greedy, trees

Juan's Colorful Tree

data structures, dfs and similar, dfs and similar, dsu, graphs, graphs, meet-in-the-middle, trees

Odd Queries on Odd Array

bitmasks, brute force, data structures, implementation, trees

Victorious Coloring (Hard Version)

data structures, greedy, schedules

Query Jungle

data structures, implementation, math, matrices, trees

Exchange Queries

combinatorics, data structures, greedy

Increasing Xor

bitmasks, data structures, math

Good Robot Paths

*special problem, data structures, geometry, sortings

To the Infinity

data structures, hashing, math, trees

Flint and Steel

data structures, dp, graphs

Induced Subgraph Queries

data structures, graphs, sortings

Maximise Sum

binary search, data structures

Shifts and Swaps

data structures, graphs, hashing, trees

Gellyfish and Lycoris Radiata (Hard Version)

data structures

Gellyfish and Lycoris Radiata (Easy Version)

data structures

Divisible Subarrays

binary search, bitmasks, brute force, data structures, interactive

Cycling (Hard Version)

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

Modulo 3

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

Kia Bakes a Cake

data structures, dp, greedy, trees

Clearing the Snowdrift

data structures, dfs and similar, dp, greedy

Wonderful Impostors

data structures, implementation, two pointers

Serval and Colorful Array (Hard Version)

data structures, greedy

Wish Upon a Satellite (Hard Version)

data structures, dp

Skyscape

constructive algorithms, data structures, greedy

Alice, Bob, And Two Arrays

*special problem, data structures, dp, games

Another Folding Strip

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

Maximum Polygon

brute force, data structures, greedy, implementation, math

Beautiful Sequence Returns

binary search, brute force, data structures, implementation

Towering Arrays

binary search, data structures

Graph Inclusion

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

Porto Vs. Benfica

data structures, dfs and similar, dsu, graphs, shortest paths

Tropical Season

binary search, data structures, greedy, implementation

Counting Is Not Fun (Hard Version)

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

The Game (Hard Version)

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

Kevin and Binary String (Hard Version)

data structures, dp

Stop Gaming (Hard Version)

brute force, constructive algorithms, data structures, hashing, strings

Coffee Break

data structures, greedy, math

Formation

binary search, data structures, dp, sortings, two pointers

Haystacks

brute force, constructive algorithms, data structures, greedy, sortings

Affectionate Arrays (Hard Version)

data structures, dp, graphs, greedy, math, shortest paths, two pointers

Affectionate Arrays (Easy Version)

data structures, dp, greedy

Geometric Balance

data structures, geometry, implementation

MEX OR Mania

bitmasks, brute force, data structures, dsu, implementation

Kevin and Strange Operation

data structures, dp

Yandex Cuneiform (Hard Version)

constructive algorithms, data structures, greedy, implementation

Yandex Cuneiform (Easy Version)

constructive algorithms, data structures, greedy

Narrower Passageway

combinatorics, data structures

Problem with Queries

brute force, data structures, implementation

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

Barrels

data structures, greedy, math

Balanced Problem

data structures, dp

Bermart Ice Cream

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

Variable Damage

data structures, flows

Hills and Pits

data structures, greedy, math, matrices

Digital Village (Extreme Version)

data structures, dfs and similar, dp, dsu, graphs, greedy, math, 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

Game in Tree (Hard Version)

binary search, data structures, trees

Game in Tree (Easy Version)

binary search, brute force, data structures, dp, games, greedy, implementation, trees

Yunli's Subarray Queries (extreme version)

data structures, dp, implementation

Iris's Full Binary Tree

brute force, data structures, dfs and similar, trees

Substring Compression

data structures, dp, matrices

Turtle and Three Sequences

brute force, data structures, dp, greedy, math, probabilities, two pointers

Turtle and Inversions (Hard Version)

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

Let Me Teach You a Lesson (Hard Version)

data structures, dp, matrices, two pointers

Let Me Teach You a Lesson (Easy Version)

2-sat, data structures, dp, matrices, two pointers

Polygonal Segments

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