Let Me Teach You a Lesson (Hard Version)

2-sat, bitmasks, data structures, graphs, matrices, two pointers

Let Me Teach You a Lesson (Easy Version)

data structures, two pointers

Cases

bitmasks, brute force, combinatorics, dfs and similar, dp, graphs, greedy, strings

Squaring

data structures, greedy, implementation, math, math, math, number theory

Bouquet (Hard Version)

data structures, greedy, math, sortings, two pointers

Bouquet (Easy Version)

binary search, greedy, sortings, sortings, two pointers

Diagonals

2-sat, binary search, bitmasks, brute force, chinese remainder theorem, combinatorics, constructive algorithms, data structures, expression parsing, fft, flows, greedy, implementation, math, meet-in-the-middle, string suffix structures, ternary search, trees

Fortnite

combinatorics, constructive algorithms, games, greedy, hashing, interactive, math, number theory, strings

Minecraft

bitmasks, brute force, dp, math

Stardew Valley

constructive algorithms, dfs and similar, graphs, trees

Wooden Game

bitmasks, greedy, math, trees

Funny Game

constructive algorithms, dsu, graphs, greedy, math, number theory, trees

Hungry Games

binary search, dp, two pointers

Fun Game

bitmasks, constructive algorithms, greedy, math

Diverse Game

constructive algorithms, greedy, implementation

Ultra-Meow

combinatorics, dp, math

Valuable Cards

brute force, dp, greedy, number theory, two pointers

Novice's Mistake

brute force, constructive algorithms, implementation, math, strings

Test of Love

dp, greedy, implementation

Gorilla and Permutation

constructive algorithms, math

Angry Monk

greedy, math, sortings

Only Pluses

brute force, constructive algorithms, greedy, math, sortings

Polygonal Segments

data structures, divide and conquer, two pointers

Catch the Mole(Hard Version)

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

Catch the Mole(Easy Version)

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

Grid Puzzle

bitmasks, dp, greedy, implementation, math

Mad MAD Sum

brute force, greedy, math

Array Craft

constructive algorithms, greedy

Submission Bait

brute force, games, greedy, sortings

Simultaneous Coloring

dfs and similar, divide and conquer, graphs

Distance to Different

combinatorics, dp, math

Smithing Skill

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

Two Movies

greedy, math

Substring and Subsequence

brute force, greedy, strings

Catch the Coin

implementation

Heartbeat

combinatorics, dp, fft, math

Range Minimum Sum

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

The Omnipotent Monster Killer

brute force, dfs and similar, dp, trees

Increasing Sequence with Fixed OR

bitmasks, constructive algorithms, greedy

Make Majority

greedy, implementation

Split the Multiset

brute force, greedy, implementation, math

Fumo Temple

interactive

Spinning Round (Hard Version)

divide and conquer, dp, trees

Spinning Round (Easy Version)

divide and conquer, dp, trees

Interesting Problem (Hard Version)

dp

Interesting Problem (Easy Version)

dp

Wonderful Tree!

brute force, data structures, dfs and similar, dsu, greedy, trees

World is Mine

dp, games

Basil's Garden

dp, greedy

K-Sort

greedy

Upload More RAM

greedy, math

Permutation Problem (Hard Version)

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

Permutation Problem (Simple Version)

binary search, brute force, combinatorics, data structures, math, number theory

Non-academic Problem

dfs and similar, graphs, trees

Beautiful Array

greedy, math, number theory, sortings

Mathematical Problem

brute force, dp, greedy, implementation, math, two pointers

Update Queries

data structures, greedy, sortings

Matrix Stabilization

brute force, data structures, greedy, sortings

X Axis

brute force, geometry, math, sortings

Maximize the Largest Component (Hard Version)

data structures, dfs and similar, dp, dsu, implementation

Maximize the Largest Component (Easy Version)

brute force, data structures, dfs and similar, dsu, graphs, implementation

D-Function

combinatorics, math, number theory

Final Boss

binary search, data structures

Secret Box

brute force, combinatorics, math

Manhattan Circle

implementation, math

Good Prefixes

greedy

Maximum Multiple Sum

brute force, math, number theory

Creating Words

implementation, strings

Tower Capturing

combinatorics, dp, geometry

Magic Trick II

constructive algorithms, implementation, sortings

Reconstruction

brute force, dp, math

Shuffle

dp, greedy, trees

''a'' String Problem

brute force, hashing, implementation, math, string suffix structures, strings

Magnitude (Hard Version)

combinatorics, dp, greedy, math

Magnitude (Easy Version)

dp, greedy, math

Large Addition

implementation, math

Strange Splitting

constructive algorithms

Your Loss

bitmasks, brute force, dp, trees

array-value

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

I Love Balls

combinatorics, math, probabilities

Swap Dilemma

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

Have Your Cake and Eat It Too

binary search, brute force, greedy, implementation

Corner Twist

constructive algorithms, greedy, implementation, math

Array Divisibility

constructive algorithms, math

Sorting Problem Again

binary search, data structures, sortings

Number of k-good subarrays

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

Beauty of the mountains

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

Boring Day

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

Collatz Conjecture

brute force, implementation, math, number theory

Soccer

greedy, implementation, math, sortings

Turtle and Paths on a Tree

data structures, dp, trees

Turtle and Intersected Segments

data structures, dsu, graphs, greedy

Turtle and Multiplication

constructive algorithms, dfs and similar, graphs, number theory

Turtle and an Incomplete Sequence

bitmasks, brute force, constructive algorithms, greedy, implementation, math

Turtle and an Infinite Sequence

bitmasks, math

Turtle and Piggy Are Playing a Game

brute force, greedy, math

Yasya and the Mysterious Tree

bitmasks, data structures, dfs and similar, graphs, greedy, strings, trees

Field Division (hard version)

math, sortings

Field Division (easy version)

data structures, math, sortings

Permutation of Rows and Columns

constructive algorithms, data structures, greedy, hashing, implementation, math, matrices, sortings