Mexification

brute force, implementation, math

Maximum Even Sum

brute force, greedy, implementation, math

From the Unknown (Hard Version)

brute force, constructive algorithms, interactive, math

Even Larger

brute force, greedy, implementation

Redstone?

brute force, data structures, implementation, math

Homework

brute force, implementation, strings

Sea, You & copriMe

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

Wafu!

bitmasks, brute force, data structures, dfs and similar, dp, math

Adjacent XOR

brute force, greedy

Permutation Blackhole

brute force, combinatorics, dp, implementation, math

Stay or Mirror

brute force, data structures, dp, greedy, sortings

Sum of LDS

brute force, combinatorics, dp, greedy, math

23 Rises Again

brute force, dfs and similar, dp, flows, graph matchings, graphs, greedy, implementation, probabilities, trees

Hamed and AghaBalaSar

brute force, combinatorics, dp, math, probabilities

1-1-1, Free Tree!

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

Only One Digit

brute force, implementation, math

Sets of Complementary Sums

brute force, combinatorics, dp, math, two pointers

Modular Sorting

brute force, data structures, greedy, math, number theory, sortings

Prefix Min and Suffix Max

brute force, data structures

Traffic Lights

brute force, data structures, divide and conquer, dp, graphs, greedy, shortest paths

Ice Baby

binary search, brute force, data structures, dp, implementation, sortings

Yamakasi

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

Letter Home

brute force, math

Red Light, Green Light (Hard version)

binary search, brute force, data structures, dfs and similar, dp, graphs, implementation, math, number theory

Red Light, Green Light (Easy version)

brute force, dfs and similar, dp, graphs, implementation, number theory

Omg Graph

brute force, dsu, graphs, greedy, shortest paths, sortings

Lost Soul

brute force, greedy

Gellyfish and Camellia Japonica

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

Build an Array

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

Small Operations

binary search, brute force, dfs and similar, dp, math, number theory, sortings

Come a Little Closer

brute force, greedy, implementation, math

Square Year

binary search, brute force, math

Smilo and Minecraft

brute force, constructive algorithms, greedy

Coloring Game

binary search, brute force, greedy, two pointers

Shrinking Array

brute force, greedy

Divisible Subarrays

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

Puzzle

brute force, constructive algorithms, greedy, math

Equal Values

brute force, greedy, two pointers

Fibonacci Cubes

brute force, dp, implementation, math

Faculty

brute force, greedy, math, number theory

Needle in a Numstack

binary search, brute force, implementation, interactive

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

Cycling (Easy Version)

binary search, brute force, dp, greedy

Apple Tree Traversing

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

Dr. TC

brute force, math

Numbers and Strings

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

Card Game

brute force, constructive algorithms, games, greedy, math

Move to the End

brute force, data structures, dp, greedy, implementation

Common Multiple

brute force, greedy, implementation, math

23 Kingdom

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

Quartet Swapping

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

Vadim's Collection

brute force, greedy

Sports Betting

2-sat, brute force, math, sortings

Would It Be Unrated?

*special problem, binary search, brute force

La Vaca Saturno Saturnita

binary search, brute force, math, number theory

Bobritto Bandito

brute force, constructive algorithms

Hackers and Neural Networks

bitmasks, brute force, greedy

Min Max MEX

binary search, brute force, greedy

Andryusha and CCB

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

Mishkin Energizer

brute force, constructive algorithms, greedy, implementation, strings

Lady Bug

brute force, constructive algorithms, implementation, math

Gleb and Boating

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

Igor and Mountain

binary search, brute force, dp

Interesting Ratio

brute force, math, number theory, two pointers

Pushing Balls

brute force, dp, implementation

Online Palindrome

brute force, constructive algorithms, interactive

Zebra-like Numbers

bitmasks, brute force, constructive algorithms, dfs and similar, dp, greedy, math

Even String

brute force, combinatorics, dp, math, strings

Large Array and Segments

binary search, brute force, greedy

Arcology On Permafrost

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

Floor or Ceil

brute force, greedy

Maximum Polygon

brute force, data structures, greedy, implementation, math

Beautiful Sequence Returns

binary search, brute force, data structures, implementation

Equalization

bitmasks, brute force, dp, graphs, math

Counting Points

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

XOR and Triangle

bitmasks, brute force, geometry, greedy, probabilities

I've Been Flipping Numbers for 300 Years and Calculated the Sum

binary search, brute force, combinatorics, divide and conquer, math, number theory

Do You Love Your Hero and His Two-Hit Multi-Target Attacks?

binary search, brute force, constructive algorithms, dp, geometry, greedy, math

For Wizards, the Exam Is Easy, but I Couldn't Handle It

brute force, greedy, implementation

Infinite Sequence (Hard Version)

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

Infinite Sequence (Easy Version)

bitmasks, brute force, dp, implementation, math

Perfecto

brute force, constructive algorithms, greedy, math

Robot Program

brute force, implementation, math

FizzBuzz Remixed

brute force, math

Mascot Naming

brute force, greedy, implementation, strings

Devyatkino

brute force, dfs and similar, greedy, math

Two Large Bags

brute force, dp, greedy, sortings

Adjacent Digit Sums

brute force, constructive algorithms, math

Skibidus and Amog'u

brute force, constructive algorithms, greedy, implementation, strings

Eating

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

Remove the Ends

brute force, constructive algorithms, dp, greedy

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

Cirno and Operations

brute force, math

Kevin and And

bitmasks, brute force, dp, greedy, math, sortings

Fibonacciness

brute force

Stop Gaming (Hard Version)

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

Stop Gaming (Easy Version)

brute force, constructive algorithms, greedy, hashing, strings

Customer Service

brute force, constructive algorithms, graph matchings, greedy, math, sortings