Anti-Increasing Addicts

constructive algorithms, dp, greedy, math

Connectivity Addicts

constructive algorithms, dsu, graphs, greedy, interactive, shortest paths, trees

Permutation Addicts

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

Prefix Sum Addicts

constructive algorithms, greedy, math, sortings

Ela and Prime GCD

constructive algorithms, math, number theory

Ela and Crickets

constructive algorithms, games, implementation, math

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

House Planning

constructive algorithms, data structures, graph matchings, greedy

Working Week

constructive algorithms, greedy, math

Rectangular Congruence

constructive algorithms, number theory

Bright, Nice, Brilliant

constructive algorithms

Conveyor

constructive algorithms, dp, math

Zero-One (Easy Version)

constructive algorithms, greedy, math

Parity Shuffle Sorting

constructive algorithms, sortings

Rule of League

constructive algorithms, math

Bestie

brute force, combinatorics, constructive algorithms, implementation, math, number theory

Prefixes and Suffixes

constructive algorithms, strings, two pointers

Jumping on Tiles

constructive algorithms, strings

Letter Picking

constructive algorithms, dp, games, two pointers

Best Permutation

constructive algorithms, greedy

Edge Split

brute force, constructive algorithms, dfs and similar, dsu, graphs, probabilities, trees

Mainak and Interesting Sequence

bitmasks, constructive algorithms, math

Hot Black Hot White

constructive algorithms, math

Even-Odd XOR

bitmasks, constructive algorithms, greedy

Matching Reduction

brute force, constructive algorithms, dfs and similar, flows, graph matchings, graphs, interactive

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Mathematical Circus

constructive algorithms, math

Impressionism

constructive algorithms, graphs, implementation, math

Madoka and The First Session

constructive algorithms, flows, graph matchings, graphs, implementation

Madoka and The Corruption Scheme

combinatorics, constructive algorithms, greedy, math

Madoka and Underground Competitions

constructive algorithms, implementation

Permutation Chain

constructive algorithms, math

Crop Squares

constructive algorithms, geometry, interactive, math

Beautiful Array

constructive algorithms, greedy, math

Crossmarket

constructive algorithms, greedy, math

Build a Tree and That Is It

constructive algorithms, implementation, trees

Lost Array

bitmasks, combinatorics, constructive algorithms, dp, math

Tournament Countdown

constructive algorithms, greedy, interactive, number theory, probabilities

Build Permutation

constructive algorithms, dp, math

Optimal Reduction

constructive algorithms, sortings

Empty Graph

binary search, constructive algorithms, data structures, greedy, shortest paths

Woeful Permutation

constructive algorithms, greedy, number theory

Perfect Permutation

constructive algorithms

Recover the Tree

constructive algorithms, trees

XOR Triangle

bitmasks, brute force, constructive algorithms, dp, greedy, math

Color the Picture

constructive algorithms, greedy, math

Recover an RBS

constructive algorithms, greedy, implementation, strings

Difference of GCDs

constructive algorithms, math

Bugaboo

bitmasks, constructive algorithms, dp, number theory

Doremy's IQ

binary search, constructive algorithms, greedy, implementation

Chopping Carrots (Hard Version)

brute force, constructive algorithms, data structures, dp, greedy, math, number theory, two pointers

Chopping Carrots (Easy Version)

binary search, brute force, constructive algorithms, greedy, number theory

Another String Minimization Problem

2-sat, constructive algorithms, greedy, string suffix structures, strings

Mark and the Online Exam

bitmasks, constructive algorithms, interactive, probabilities

Mark and Lightbulbs

combinatorics, constructive algorithms, greedy, math, sortings

Mark the Dust Sweeper

constructive algorithms, greedy, implementation

Game of AI (easy version)

combinatorics, constructive algorithms, dp, fft, math

Mio and Lucky Array

constructive algorithms, fft, math, strings

Colouring Game

constructive algorithms, dp, games

Count Seconds

brute force, constructive algorithms, dp, graphs, implementation, math

Magical Array

constructive algorithms, hashing, implementation, math

Two 0-1 Sequences

constructive algorithms, greedy

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Round Down the Price

constructive algorithms

Puzzle

constructive algorithms, dp, greedy

Serega the Pirate

brute force, constructive algorithms

Helping the Nature

constructive algorithms, data structures, greedy

Palindromic Numbers

constructive algorithms, implementation, math

Optimal Path

constructive algorithms, greedy, math

The Third Problem

combinatorics, constructive algorithms, math

Almost Ternary Matrix

bitmasks, constructive algorithms, matrices

The Third Three Number Problem

constructive algorithms, math

Equal Reversal

constructive algorithms, graphs, implementation, math

Fixed Point Guessing

binary search, constructive algorithms, interactive

Rising Sand

constructive algorithms, greedy, implementation

Too Many Constraints

2-sat, constructive algorithms, graphs, implementation

Coloring

brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math

Guess The String

binary search, constructive algorithms, interactive

awoo's Favorite Problem

binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers

Tree Recovery

brute force, constructive algorithms, dfs and similar, dsu, graphs, trees

Permutation Graph

binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths

Fishingprince Plays With Array

constructive algorithms, greedy, implementation, math

Ambiguous Dominoes

constructive algorithms, dfs and similar, graphs

Tree Queries (Hard Version)

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

Tree Queries (Easy Version)

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

Paranoid String

constructive algorithms, greedy

Max GEQ Sum

binary search, constructive algorithms, data structures, divide and conquer, implementation, two pointers

Sum of Substrings

brute force, constructive algorithms, greedy, math, strings

Shoe Shuffling

constructive algorithms, greedy, implementation, two pointers

Print a Pedestal (Codeforces logo?)

constructive algorithms, greedy

ANDfinity

bitmasks, brute force, constructive algorithms, dfs and similar, dsu, graphs

Manipulating History

constructive algorithms, greedy, strings

Patchouli's Magical Talisman

bitmasks, constructive algorithms, greedy, sortings

Become Big For Me

combinatorics, constructive algorithms, greedy, math, number theory

Railway System

constructive algorithms, graphs, greedy, interactive, sortings

Permutation Weight (Hard Version)

constructive algorithms, greedy

Permutation Weight (Easy Version)

constructive algorithms, dfs and similar, dsu

Bring Balance

brute force, constructive algorithms, greedy

Circular Local MiniMax

constructive algorithms, greedy, sortings

Hard Cut

constructive algorithms, dfs and similar, divide and conquer, math