a-Good String

bitmasks, brute force, divide and conquer, dp, implementation

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Koa and the Beach (Easy Version)

brute force, dp, greedy

Special Edges

flows, graphs

Strange Operation

combinatorics, data structures, dp

Rearrange

brute force, constructive algorithms, graphs, greedy, sortings

String Transformation 2

bitmasks, dp, graphs, trees

GameGame

bitmasks, constructive algorithms, dp, games, greedy, math

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Origami

geometry, math, sortings

The Majestic Brown Tree Snake

dfs and similar, dp, greedy, trees, two pointers

Mastermind

constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers

Unmerge

dp

Prefix Flip (Hard Version)

constructive algorithms, data structures, implementation, strings, two pointers

Circular Dungeon

greedy, math, probabilities

Strange Addition

data structures, dp, matrices

Merging Towers

data structures, dsu, implementation, trees

Berserk And Fireball

constructive algorithms, greedy, implementation, math, two pointers

Create The Teams

brute force, dp, greedy, implementation, sortings

Universal Solution

greedy

Chess Strikes Back (hard version)

data structures, divide and conquer

Chess Strikes Back (easy version)

binary search, data structures

Inverse Genealogy

constructive algorithms, divide and conquer, dp, math, trees

New Passenger Trams

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

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Dubious Cyrpto

binary search, brute force, math, number theory

Acacius and String

brute force, implementation, strings

Cubic Lattice

geometry, math, matrices, number theory

Set Merging

constructive algorithms, divide and conquer

Tree Modification

brute force, constructive algorithms, dfs and similar, graph matchings, graphs, trees

Integer Game

constructive algorithms, games, interactive, math

Inversion SwapSort

constructive algorithms, greedy, sortings

Replace by MEX

brute force, constructive algorithms, sortings

Element Extermination

constructive algorithms, data structures, greedy

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Reading Books (hard version)

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

Reading Books (easy version)

data structures, greedy, sortings

Zero Remainder Array

math, sortings, two pointers

Pawns

data structures, divide and conquer, greedy

Network Coverage

binary search, constructive algorithms, data structures, greedy

Sum of Digits

brute force, constructive algorithms, dp, greedy

Maximum Sum on Even Positions

divide and conquer, dp, greedy, implementation

Omkar and Modes

binary search, divide and conquer, interactive

Omkar and Last Floor

dp, greedy, two pointers

Omkar and Circle

brute force, dp, games, greedy

Omkar and Baseball

constructive algorithms, math

Raging Thunder

data structures, divide and conquer, implementation

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings

Grid-00100

constructive algorithms, greedy, implementation

The Hidden Pair (Hard Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

The Hidden Pair (Easy Version)

binary search, dfs and similar, graphs, interactive, shortest paths, trees

Binary Subsequence Rotation

binary search, constructive algorithms, data structures, greedy

Odd-Even Subsequence

binary search, dp, dsu, greedy, implementation

Number Game

games, math, number theory

BareLee

dfs and similar, dp, games

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

TediousLee

dp, graphs, greedy, math, trees

RationalLee

greedy, math, sortings, two pointers

Breadboard Capacity (hard version)

Breadboard Capacity (easy version)

dp, flows, greedy

Shifting Dominoes

data structures, geometry, graphs, trees

Lamps on a Circle

games, implementation, interactive, math

Ski Accidents

constructive algorithms, graphs, greedy

AND, OR and square sum

bitmasks, greedy, math

Even Picture

constructive algorithms

Codeforces Subsequences

brute force, constructive algorithms, greedy, math, strings

Flying Sort (Hard Version)

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

Flying Sort (Easy Version)

dp, greedy, two pointers

Necklace Assembly

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

Task On The Board

constructive algorithms, greedy, implementation, sortings

Construct the String

data structures, dp, strings

Jog Around The Graph

binary search, dp, geometry, graphs

Two Arrays

binary search, brute force, combinatorics, constructive algorithms, dp, two pointers

Two Divisors

constructive algorithms, math, number theory

Palindromic Paths

greedy, math

Secure Password

bitmasks, combinatorics, constructive algorithms, interactive, math

Swaps Again

constructive algorithms, implementation, sortings

Maximum Subsequence Value

brute force, constructive algorithms

Solve The Maze

constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, shortest paths

Rotation Matching

constructive algorithms, data structures, greedy, implementation

X-OR

bitmasks, constructive algorithms, divide and conquer, interactive, probabilities

Ehab's Last Corollary

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

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Rotating Substrings

dp, strings

Tree Shuffling

dfs and similar, dp, greedy, trees

Guess The Maximums

binary search, implementation, interactive, math

Game On Leaves

games, trees

Subsequence Hate

implementation, strings

Johnny and Another Rating Drop

bitmasks, greedy, math

Johnny and New Toy

data structures, implementation, math

James and the Chase

dfs and similar, graphs, probabilities, trees

Johnny and James

greedy, implementation, math, trees

Johnny and Megan's Necklace

binary search, bitmasks, constructive algorithms, dfs and similar, dsu, graphs

Johnny and Grandmaster

greedy, implementation, math, sortings

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Binary Median

binary search, bitmasks, brute force, constructive algorithms

A/B Matrix

constructive algorithms, greedy, math

Spy-string

bitmasks, brute force, constructive algorithms, dp, hashing, strings

RC Kaboom Show

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