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

Turtle and Paths on a Tree

data structures, dp, trees

Remove Bridges

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

Next and Prev

brute force, data structures, implementation

Conference

data structures, flows

Frequency Mismatch (Hard Version)

binary search, data structures, dfs and similar, hashing, probabilities, trees

Nene and the Passing Game

constructive algorithms, data structures, dsu, graphs, sortings

Farmer John's Favorite Intern

data structures, dp, flows, trees

Farmer John's Favorite Function

brute force, data structures, implementation, math

Bitwise Paradox

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

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Prefix Max Set Counting

data structures, dp, trees

Digital Patterns

combinatorics, data structures, implementation, math

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Wine Factory (Hard Version)

data structures, dp, flows, greedy, matrices

Palindromic Problem

binary search, data structures, hashing, string suffix structures, strings

Parallel Swaps Sort

constructive algorithms, data structures

Beautiful Tree

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

Local Deletions

binary search, data structures, implementation

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Doremy's Average Tree

data structures, dp, greedy, trees

Split

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

Diamond Theft

data structures, greedy

Last Man Standing

brute force, data structures, number theory

Clubstep

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

Ball-Stackable

constructive algorithms, data structures, dp, trees

Standard Graph Problem

data structures, graphs, greedy, trees

MEXanization

data structures

LIS?

data structures, greedy, implementation

Freak Joker Process

binary search, data structures, sortings

Evaluate RBS

data structures, geometry, implementation, math, sortings

Teleportation in Byteland

data structures, dfs and similar, divide and conquer, graphs, shortest paths, trees

Panda Meetups

data structures, dp, flows

Rivalries

constructive algorithms, data structures, greedy

XOR Partition

binary search, bitmasks, data structures, divide and conquer, greedy, trees

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Min Cost Permutation (Hard Version)

binary search, constructive algorithms, data structures, greedy, math, sortings

The Third Grace

data structures, dp

Bully Sort

data structures, math

Copium Permutation

constructive algorithms, data structures, greedy

Two Centroids

data structures, dfs and similar, greedy, trees

LuoTianyi and Cartridge

data structures, trees

LuoTianyi and the Function

data structures

Willy-nilly, Crack, Into Release!

data structures, dp

Misha and Apples

brute force, data structures, dp, two pointers

M-tree

data structures, math, sortings, trees

Flow Control

data structures, dsu, implementation

A task for substrings

data structures, string suffix structures, strings

Gasoline prices

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

Li Hua and Path

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

Treasure Hunt

data structures, divide and conquer, two pointers

Codeforces Scoreboard

binary search, data structures, dp, geometry

Colorful Tree Again

brute force, data structures, trees

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Crossing the Railways

data structures, dp

Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

Magician and Pigs (Hard Version)

binary search, brute force, data structures, implementation

Two Subtrees

data structures, trees

Doremy's Paint 2

data structures

Edge Queries

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

Decent Division

constructive algorithms, data structures

BinaryStringForces

constructive algorithms, data structures, dp

Distance to the Path

data structures, dfs and similar, trees

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Kazaee

data structures, hashing, probabilities

Antifibonacci Cut

bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

MEX Tree Manipulation

data structures, trees

Palindrome Addicts

data structures, strings

Ela Takes Dancing Class

binary search, data structures

Pebbles and Beads

data structures, geometry

Location

data structures, dp, math, number theory

Almost Sorted

bitmasks, data structures, dp

Maximums and Minimums

combinatorics, data structures, divide and conquer, number theory

A Certain Magical Party

combinatorics, data structures, greedy, sortings

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Burenka, an Array and Queries

data structures, math, number theory

Permutation for Burenka

data structures, graph matchings, greedy, math, trees

Triameter

binary search, data structures, dfs and similar, trees

Replace

binary search, data structures

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

Outermost Maximums

data structures, greedy

Decinc Dividing

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

Cute number

binary search, brute force, data structures, dsu, implementation, math

The Ultimate LIS Problem

data structures, greedy

MCMF?

data structures, flows, graphs, greedy, sortings, two pointers

Tokitsukaze and Beautiful Subsegments

data structures

PermutationForces

data structures, greedy

Zigu Zagu

constructive algorithms, data structures, greedy

Equal LCM Subsets

data structures, math, number theory

Snowy Mountain

data structures, dfs and similar, graphs, greedy, shortest paths, trees