Black Cells

binary search, brute force, constructive algorithms, greedy

Perpendicular Segments

constructive algorithms, geometry, greedy, math

Variable Damage

data structures, flows

Choose Your Queries

constructive algorithms, dfs and similar, dp, graphs, greedy, trees

Card Game

combinatorics, dp, fft, greedy, math

Attribute Checks

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

New Game

binary search, brute force, greedy, implementation, sortings, two pointers

Binomial Coefficients, Kind Of

combinatorics, dp, math

Two Screens

binary search, greedy, strings, two pointers

Buying Lemonade

binary search, constructive algorithms, sortings

Profitable Interest Rate

greedy, math

Hills and Pits

data structures, greedy, math, matrices

Tree of Life

dp, greedy, trees

Many Games

brute force, dp, greedy, math, probabilities

C+K+S

constructive algorithms, dfs and similar, graphs, greedy, hashing, implementation, strings

Skipping

binary search, dp, graphs, shortest paths

Concatenation of Arrays

constructive algorithms, greedy, math, sortings

Billetes MX (Hard Version)

binary search, combinatorics, data structures, dsu, graphs

Billetes MX (Easy Version)

2-sat, binary search, combinatorics, constructive algorithms, dfs and similar, dsu, graphs

Asesino (Hard Version)

constructive algorithms, dp, interactive

Asesino (Easy Version)

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

Gerrymandering

dp, implementation

Kar Salesman

binary search, greedy, math

Bus to Pénjamo

constructive algorithms, greedy, implementation, math

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

Boss, Thirsty

dp, greedy, implementation

Adjust The Presentation (Hard Version)

constructive algorithms, data structures, greedy, implementation, sortings

Adjust The Presentation (Easy Version)

constructive algorithms, greedy

Maximize Mex

brute force, greedy, math, number theory

Meaning Mean

data structures, greedy, math, sortings

Count Leaves

dp, math, number theory

Expected Power

bitmasks, dp, math, probabilities

Connect the Dots

brute force, dp, dsu, graphs, math, trees

Bitwise Balancing

bitmasks, hashing, implementation, math, schedules, ternary search

Brightness Begins

binary search, math

Find Minimum Operations

bitmasks, brute force, greedy, math, number theory

All Pairs Segments

implementation, math

Max Plus Size

brute force, dp, greedy

Speedbreaker Counting (Hard Version)

dp, greedy, math

Speedbreaker Counting (Medium Version)

dp, greedy, math

Speedbreaker Counting (Easy Version)

combinatorics, dp, greedy, math

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

Tree Pruning

brute force, dfs and similar, greedy, sortings, trees

Speedbreaker

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

Cards Partition

2-sat, brute force, greedy, implementation, math

Robin Hood Archery

data structures, divide and conquer, greedy, hashing

Milky Days

brute force, data structures, greedy, implementation

Sheriff's Defense

dfs and similar, dp, greedy, trees

Rendez-vous de Marian et Robin

dfs and similar, graphs, shortest paths

Robert Hood and Mrs Hood

brute force, data structures, greedy, sortings

Robin Hood in Town

binary search, greedy, math

Robin Hood and the Major Oak

math

Robin Helps

greedy, implementation

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

Prefix GCD

brute force, dp, greedy, math, number theory

Minimize the Difference

binary search, greedy

Password Cracking

constructive algorithms, interactive, strings

Battle for Survive

constructive algorithms, greedy, math

Zhan's Blender

constructive algorithms, math

Stack and Queue

*special problem, data structures, divide and conquer

Strange Matrix

*special problem, graphs, greedy

Removal of a Permutation

*special problem

Good Subarray

*special problem, data structures, greedy

Rock-Paper-Scissors Bot

*special problem, greedy, strings

Among Wolves

*special problem

Split the Expression

*special problem

Shuffle

*special problem

Problem Solving

*special problem

Message Transmission Error (hard version)

hashing, string suffix structures, strings, two pointers

Message Transmission Error (easy version)

brute force, strings

Three Brothers

brute force, implementation, math

Alternating Sum of Numbers

brute force, implementation, math

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

Klee's SUPER DUPER LARGE Array!!!

binary search, math, ternary search

Satyam and Counting

geometry, math

The Legend of Freya the Frog

implementation, math

osu!mania

brute force, implementation

Minimize!

brute force, math

Sakurako's Test

binary search, brute force, greedy, math, number theory

Sakurako's Task

binary search, greedy, math, number theory

Sakurako's Box

combinatorics, math, number theory

Alternating String

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

Sakurako's Hobby

dp, dsu, graphs, math

Longest Good Array

binary search, brute force, math

Square or Not

brute force, math, strings

Sakurako's Exam

brute force, constructive algorithms, greedy, math

Dora and C++

math, number theory

Index and Maximum Value

data structures, greedy

Dora's Set

greedy, math, number theory

Dora's Paint

brute force, combinatorics, constructive algorithms, graphs, implementation

Iris's Full Binary Tree

brute force, data structures, dfs and similar, trees

Iris and Adjacent Products

data structures, greedy, implementation, math