Serval and Music Game

brute force, dp, implementation, math, number theory

Serval and Shift-Shift-Shift

bitmasks, brute force, constructive algorithms, implementation

Serval and Toxel's Arrays

combinatorics, dp, implementation, math

Serval and Inversion Magic

brute force, implementation, strings, two pointers

Serval and Mocha's Array

brute force, math, number theory

XOR, Tree, and Queries

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

Sum Over Zero

data structures, dfs and similar, dp

Moving Dots

binary search, brute force, combinatorics, math, two pointers

Matching Numbers

constructive algorithms, greedy, math

Sum of Two Numbers

constructive algorithms, greedy, implementation, math, probabilities

One and Two

brute force, implementation, math

Treasure Hunt

data structures, divide and conquer, two pointers

Codeforces Scoreboard

binary search, data structures, dp, geometry

Colorful Tree Again

brute force, data structures, trees

Inverse Transformation

constructive algorithms, implementation, math

The Harmonization of XOR

bitmasks, constructive algorithms, greedy, math

Game on Axis

combinatorics, dfs and similar, dsu, graphs, implementation

Remove the Bracket

dp, greedy, math

Number Factorization

greedy, math, number theory

Exponential Equation

constructive algorithms, math

Cake Assembly Line

brute force, sortings

Alternating Deck (hard version)

implementation

Non-alternating Deck (easy version)

implementation

Minimums or Medians

Infinite Game

brute force, combinatorics, dp, games, probabilities

Wooden Spoon

combinatorics, dp

Monsters (hard version)

data structures, greedy

Letter Exchange

constructive algorithms

Monsters (easy version)

brute force, greedy

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Double Sort II

dfs and similar, flows, graph matchings, graphs

Game of the Year

brute force, data structures, math, number theory

Different Arrays

brute force, dp, implementation

Yet Another Tournament

binary search, greedy, sortings

Matrix of Differences

constructive algorithms, math

Make it Beautiful

constructive algorithms, math, sortings

Window Signals (hard version)

Window Signals (easy version)

Diverse Coloring

constructive algorithms, trees

Bracket Insertion

combinatorics, dp, math, trees

Rectangle Shrinking

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

Many Perfect Squares

brute force, math, number theory

Equal Frequencies

brute force, constructive algorithms, greedy, implementation, sortings, strings

Going to the Cinema

brute force, greedy, sortings

Parallel Projection

geometry, math

Delicious Dessert

binary search, dsu, hashing, math, number theory, string suffix structures

Three Chairs

bitmasks, brute force, combinatorics, data structures, dp, number theory, sortings

Josuke and Complete Graph

binary search, brute force, data structures, math, number theory

Bit Guessing Game

binary search, bitmasks, constructive algorithms, interactive

GCD Partition

brute force, greedy, math, number theory

Hayato and School

constructive algorithms, greedy

Olympic Team Building

brute force, meet-in-the-middle

The Game of the Century

constructive algorithms, graphs, shortest paths

Xorcerer's Stones

bitmasks, constructive algorithms, dp, trees

Anya's Simultaneous Exhibition

constructive algorithms, graphs, greedy, interactive, sortings

Boris and His Amazing Haircut

constructive algorithms, data structures, dp, dsu, greedy, sortings

Least Prefix Sum

data structures, greedy

MKnez's ConstructiveForces Task

constructive algorithms, math

Hall of Fame

constructive algorithms, greedy, strings

Maximizing Root

dfs and similar, dp, graphs, math, number theory, trees

The Tree Has Fallen!

bitmasks, dfs and similar, math, trees

Flexible String Revisit

combinatorics, dp, math, probabilities

Flexible String

bitmasks, brute force, strings

The Forbidden Permutation

greedy, math

Flip Flop Sum

greedy, implementation

Comfortably Numb

bitmasks, data structures, divide and conquer, strings, trees

Edge Reverse

binary search, dfs and similar, graphs, trees

Score of a Tree

bitmasks, combinatorics, dfs and similar, dp, math, probabilities, trees

Quiz Master

binary search, math, number theory, sortings, two pointers

Emordnilap

combinatorics, greedy, math

Everybody Likes Good Arrays!

greedy, math

Count Permutations

math

Parmigiana With Seafood

binary search, dp, greedy, trees

Controllers

binary search, math

Uniform Chemistry

dp, math

Italian Data Centers

graphs, shortest paths

Spinach Pizza

games, geometry, greedy, interactive

Beppa and SwerChat

two pointers

Another Wine Tasting Event

combinatorics, constructive algorithms, math, strings

Train Splitting

constructive algorithms, graphs, greedy

Crossing the Railways

data structures, dp

Teamwork

constructive algorithms, greedy, math

Library game

games, greedy, interactive, sortings

Vittorio Plays with LEGO Bricks

dp, geometry

Walking Boy

greedy

Laboratory on Pluto

constructive algorithms, dp, greedy, math

The Human Equation

greedy, implementation

Friendly Spiders

dfs and similar, graphs, math, number theory, shortest paths

Interesting Sequence

bitmasks, math

Gardener and the Array

bitmasks, constructive algorithms

Gardener and the Capybaras (hard version)

constructive algorithms, greedy

Gardener and the Capybaras (easy version)

brute force, constructive algorithms, implementation

Maximum Permutation

constructive algorithms

Segment Covering

brute force, combinatorics, constructive algorithms, data structures, dp, trees

Magician and Pigs (Hard Version)

binary search, brute force, data structures, implementation

Magician and Pigs (Easy Version)

brute force, data structures, implementation

Two Chess Pieces

dfs and similar, dp, greedy, trees

Same Count One

brute force, constructive algorithms, greedy, implementation, two pointers

Ice and Fire

constructive algorithms, dp, greedy

Coloring

constructive algorithms, greedy, math