Three Brothers

brute force, implementation, math

Alternating Sum of Numbers

brute force, implementation, math

Yunli's Subarray Queries (extreme version)

data structures, dp, implementation

The Legend of Freya the Frog

implementation, math

osu!mania

brute force, implementation

Alternating String

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

Dora's Paint

brute force, combinatorics, constructive algorithms, graphs, implementation

Iris and Adjacent Products

data structures, greedy, implementation, math

Subtangle Game (Hard Version)

data structures, dp, games, greedy, implementation

Subtangle Game (Easy Version)

dp, games, greedy, implementation

Alter the GCD

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

Lazy Narek

dp, implementation, strings

Colored Portals

binary search, brute force, data structures, graphs, greedy, implementation, shortest paths

Closest Point

implementation, math

Turtle and a MEX Problem (Hard Version)

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

Distanced Coloring

constructive algorithms, implementation, math

Longest Max Min Subsequence

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

Make All Equal

greedy, implementation

Ksyusha and the Loaded Set

binary search, brute force, data structures, implementation

Color Rows and Columns

dp, greedy, implementation, math

Right Left Wrong

greedy, implementation, two pointers

Primary Task

implementation, math, strings

Triple Operations

dp, implementation, math

Slavic's Exam

greedy, implementation, strings

Showering

greedy, implementation

Card Game

brute force, constructive algorithms, implementation

A+B Again?

implementation, math

Eliminating Balls With Merging (Hard Version)

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

Perform Operations to Maximize Score

binary search, brute force, constructive algorithms, greedy, implementation

Find K Distinct Points with Fixed Center

constructive algorithms, implementation, math

Level Up

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

Strong Password

brute force, implementation, strings

Decode

combinatorics, data structures, implementation, math

Scale

greedy, implementation

Squaring

brute force, constructive algorithms, greedy, implementation, math, number theory

Diagonals

brute force, greedy, implementation, math

Diverse Game

constructive algorithms, greedy, implementation

Xor-Grid Problem

bitmasks, constructive algorithms, dp, implementation

Light Switches

implementation, math

Question Marks

greedy, implementation

Novice's Mistake

brute force, constructive algorithms, implementation, math, strings

Test of Love

dp, greedy, implementation

Grid Reset

constructive algorithms, greedy, implementation

Triangle Formation

brute force, greedy, implementation, math, sortings

Maximize the Last Element

greedy, implementation

Grid Puzzle

bitmasks, brute force, dp, greedy, implementation

Catch the Coin

implementation

Range Minimum Sum

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

Make Majority

greedy, implementation

Split the Multiset

brute force, greedy, implementation, math

Mathematical Problem

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

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

Manhattan Circle

implementation, math

Creating Words

implementation, strings

Magic Trick II

constructive algorithms, implementation, sortings

''a'' String Problem

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

Large Addition

implementation, math

Have Your Cake and Eat It Too

binary search, brute force, greedy, implementation

Corner Twist

constructive algorithms, greedy, implementation, math

Beauty of the mountains

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

Collatz Conjecture

brute force, implementation, math, number theory

Soccer

greedy, implementation, math, sortings

Turtle and an Incomplete Sequence

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

Permutation of Rows and Columns

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

GCD-sequence

greedy, implementation, math, number theory

Manhattan Triangle

binary search, constructive algorithms, data structures, geometry, implementation, two pointers

Guess the Maximum

brute force, greedy, implementation

Computing Machine

brute force, data structures, dp, greedy, implementation

Elections

data structures, greedy, implementation, math

Manhattan Permutations

constructive algorithms, data structures, greedy, implementation, math

Invertible Bracket Sequences

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

Job Interview

binary search, dp, greedy, implementation, two pointers

Increase/Decrease/Copy

greedy, implementation

Verify Password

implementation, sortings, strings

Chain Queries

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

Bazoka and Mocha's Array

brute force, greedy, implementation, sortings

Cutting Game

binary search, brute force, data structures, implementation, sortings, two pointers

Ingenuity-2

constructive algorithms, greedy, implementation

Symmetric Encoding

implementation, sortings, strings

Maximum GCD Sum Queries

bitmasks, brute force, dp, implementation, number theory

Cat, Fox and Double Maximum

constructive algorithms, greedy, implementation, math, sortings

Chess For Three

brute force, dp, implementation, math

Circle Perimeter

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

Binary Cut

dp, greedy, implementation, sortings, strings

Clock and Strings

implementation

Different String

implementation, strings

My First Sorting Problem

implementation, sortings

Playing Quidditch (Hard)

implementation

Playing Quidditch (Medium)

implementation

Playing Quidditch (Easy)

implementation

Balanced Shuffle (Easy)

implementation, sortings

Card Pairing

dp, greedy, hashing, implementation

Minimizing the Sum

dp, implementation

Two Friends

constructive algorithms, implementation, math

Next and Prev

brute force, data structures, implementation

Long Way to be Non-decreasing

binary search, dfs and similar, graphs, implementation, shortest paths, two pointers

Permutation Counting

binary search, greedy, implementation, math, sortings

Rectangle Filling

constructive algorithms, implementation

A BIT of a Construction

bitmasks, constructive algorithms, greedy, implementation