Divisible Subarrays

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

Changing the String

binary search, data structures, greedy, implementation, sortings, strings

Creating a Schedule

constructive algorithms, data structures, greedy, implementation, sortings

Neo's Escape

binary search, brute force, data structures, dp, dsu, graphs, greedy, implementation

Cycling (Hard Version)

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

Modulo 3

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

Move to the End

brute force, data structures, dp, greedy, implementation

Maximize Nor

bitmasks, data structures, dp, implementation, sortings

Kia Bakes a Cake

data structures, dp, greedy, trees

Mani and Segments

data structures, implementation, sortings, two pointers

23 Kingdom

binary search, brute force, data structures, greedy, ternary search, two pointers

Quartet Swapping

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

Clearing the Snowdrift

data structures, dfs and similar, dp, greedy

Wonderful Impostors

data structures, implementation, two pointers

Chimpanzini Bananini

data structures, implementation, math

Shorten the Array

binary search, bitmasks, data structures, dfs and similar, greedy, strings, trees, two pointers

Gleb and Boating

brute force, constructive algorithms, data structures, dp, graphs, greedy, math, number theory, shortest paths

Dining Hall

data structures, greedy, implementation, sortings

Canteen (Hard Version)

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

Canteen (Easy Version)

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

Serval and Colorful Array (Hard Version)

data structures, greedy

Serval and Colorful Array (Easy Version)

data structures, greedy

Serval and Kaitenzushi Buffet

data structures, graph matchings, greedy

Wish Upon a Satellite (Hard Version)

data structures, dp

Skyscape

constructive algorithms, data structures, greedy

You Soared Afar With Grace

constructive algorithms, data structures, greedy, implementation

Arithmetic Exercise

*special problem, data structures, dp, 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

Binary Subsequence Value Sum

combinatorics, data structures, dp, fft, math, matrices

Beautiful Sequence Returns

binary search, brute force, data structures, implementation

Counting Points

brute force, data structures, geometry, implementation, two pointers

Towering Arrays

binary search, data structures

Infinite Sequence (Hard Version)

bitmasks, brute force, constructive algorithms, data structures, dp, implementation, math

Trapmigiano Reggiano

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

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

Porto Vs. Benfica

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

Tropical Season

binary search, data structures, greedy, implementation

White Magic

constructive algorithms, data structures, dp, greedy, implementation

Bro Thinks He's Him

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

Skibidus and Slay

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

We Be Summing

binary search, data structures, dp, two pointers

Mycraft Sand Sort

combinatorics, data structures, dsu, greedy, math, sortings

Eating

binary search, bitmasks, brute force, data structures, dp, greedy, trees, two pointers

Counting Is Not Fun (Hard Version)

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

Counting Is Not Fun (Easy Version)

combinatorics, data structures, dfs and similar, dp, dsu, graphs, hashing, implementation, math, trees

Triangle Tree

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

Game With Triangles

binary search, brute force, data structures, geometry, greedy, implementation, math, ternary search, two pointers

Remove Exactly Two

brute force, data structures, dfs and similar, dp, graphs, greedy, sortings, trees

Subsequence Update

constructive algorithms, data structures, greedy, sortings

The Game (Hard Version)

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

The Game (Easy Version)

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

Kevin and Binary String (Hard Version)

data structures, dp

Kevin and Numbers

bitmasks, data structures

Stop Gaming (Hard Version)

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

Graph and Graph

data structures, graphs, greedy, shortest paths

Coffee Break

data structures, greedy, math

Formation

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

Gifts Order

data structures, greedy, implementation, math, matrices

Unique Median

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

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

Earnest Matrix Complement

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

Refined Product Optimality

binary search, data structures, greedy, math, schedules, sortings

Outstanding Impressionist

binary search, brute force, data structures, greedy

Geometric Balance

data structures, geometry, implementation

Best Price

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

Maximum modulo equality

data structures, divide and conquer, math, number theory

MEX OR Mania

bitmasks, brute force, data structures, dsu, implementation

Kevin and Strange Operation

data structures, dp

Kevin and Math Class

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

Kevin and Competition Memories

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

Yandex Cuneiform (Hard Version)

constructive algorithms, data structures, greedy, implementation

Yandex Cuneiform (Easy Version)

constructive algorithms, data structures, greedy

Adventurers

binary search, data structures, greedy, sortings, ternary search, two pointers

Move Back at a Cost

binary search, data structures, greedy, sortings

Xorderable Array

bitmasks, data structures

Microwavable Subsequence

data structures

Narrower Passageway

combinatorics, data structures

Hard Demon Problem

constructive algorithms, data structures, dp, implementation, math

Easy Demon Problem

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

Problem with Queries

brute force, data structures, implementation

Matrix Transformation

bitmasks, brute force, data structures, dfs and similar, graphs, greedy, implementation

Sums on Segments

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

Two Subarrays

data structures, dp, implementation, matrices

Vertex Pairs

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

Recommendations

data structures, implementation, sortings, two pointers

Selection Sort

binary search, data structures, greedy, two pointers

Bottle Arrangement

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

Auto Complete

binary search, data structures, hashing, implementation, sortings, strings, trees

Polyathlon

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

Alternative Platforms

combinatorics, data structures, fft, math, sortings

Barrels

data structures, greedy, math

Divide OR Conquer

binary search, bitmasks, data structures, dp, implementation

DIY

data structures, geometry, greedy, sortings

Natlan Exploring

bitmasks, combinatorics, data structures, dp, math, number theory

Ardent Flames

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