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

Sharky Surfing

data structures, greedy, two pointers

Reverse the Rivers

binary search, constructive algorithms, data structures, greedy

Yet Another Real Number Problem

binary search, data structures, divide and conquer, greedy, implementation, math

Rakhsh's Revival

data structures, greedy, implementation, two pointers

Sakurako and Chefir

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

Sakurako, Kosuke, and the Permutation

brute force, data structures, dfs and similar, dsu, graphs, greedy, math

Kousuke's Assignment

data structures, dp, dsu, greedy, math

Balanced

constructive algorithms, data structures, greedy, implementation, math

Genokraken

constructive algorithms, data structures, graphs, greedy, implementation, interactive, trees, two pointers

Penchick and Chloe's Trees

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

Penchick and Desert Rabbit

binary search, data structures, dfs and similar, dp, dsu, greedy, implementation, two pointers

Orangutan Approved Subarrays

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

MEXimize the Score

combinatorics, data structures, dp, greedy, implementation, math

QED's Favorite Permutation

data structures, implementation, sortings

Balanced Problem

data structures, dp

Cool Graph

constructive algorithms, data structures, dfs and similar, dsu, graphs, greedy, trees

New Rating

binary search, data structures, dp, greedy

Alice's Adventures in Cards

constructive algorithms, data structures, dp, graphs, greedy, implementation, ternary search

The Endspeaker (Hard Version)

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

Add Zeros

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

Bermart Ice Cream

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

Sums of Segments

binary search, data structures, dp, implementation, math

Action Figures

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

Variable Damage

data structures, flows

Attribute Checks

brute force, data structures, dp, implementation, math, two pointers

Hills and Pits

data structures, greedy, math, matrices

Billetes MX (Hard Version)

binary search, combinatorics, data structures, dsu, graphs

Digital Village (Extreme Version)

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

Digital Village (Hard Version)

data structures, dp, dsu, graphs, math, trees

Digital Village (Easy Version)

brute force, data structures, dfs and similar, dp, dsu, fft, graphs, greedy, implementation, math, trees

Adjust The Presentation (Hard Version)

constructive algorithms, data structures, greedy, implementation, sortings

Meaning Mean

data structures, greedy, math, sortings

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

Max Plus Min Plus Size

data structures, dp, dsu, greedy, implementation, matrices, sortings

Speedbreaker

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

Robin Hood Archery

data structures, divide and conquer, greedy, hashing

Milky Days

brute force, data structures, greedy, implementation

Robert Hood and Mrs Hood

brute force, data structures, greedy, 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

Stack and Queue

*special problem, data structures, divide and conquer

Good Subarray

*special problem, data structures, greedy

Yunli's Subarray Queries (extreme version)

data structures, dp, implementation

Yunli's Subarray Queries (hard version)

binary search, data structures, dp

Yunli's Subarray Queries (easy version)

binary search, data structures, two pointers

Firefly's Queries

bitmasks, data structures, flows, math

Alternating String

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

Index and Maximum Value

data structures, greedy

Iris's Full Binary Tree

brute force, data structures, dfs and similar, trees

Iris and Adjacent Products

data structures, greedy, implementation, math

Eri and Expanded Sets

data structures, divide and conquer, math, number theory, two pointers

Iris and the Tree

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

Subtangle Game (Hard Version)

data structures, dp, games, greedy, implementation

Alter the GCD

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

Substring Compression

data structures, dp, matrices

Make a Palindrome

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

Colored Portals

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