Bits

bitmasks, constructive algorithms

Add, Divide and Floor

constructive algorithms, greedy, math

Vasya and Isolated Vertices

constructive algorithms, graphs

Swap Letters

constructive algorithms, greedy

Nene's Magical Matrix

constructive algorithms, greedy, math

Equalize by Divide

brute force, constructive algorithms, greedy, math

Vladik and flights

constructive algorithms, greedy, implementation

Valera and Tubes

constructive algorithms, dfs and similar, implementation

Smaller

constructive algorithms, greedy, strings

Stoned Game

brute force, constructive algorithms, games, greedy

Packets

constructive algorithms, greedy, math

Squares and Segments

binary search, constructive algorithms, math

String Modification

brute force, constructive algorithms, implementation, sortings, strings

Diameter of Graph

constructive algorithms, graphs, greedy, math

Binary String Constructing

constructive algorithms

Min Cost String

brute force, constructive algorithms, graphs, greedy, strings

Dice Tower

constructive algorithms, greedy

Fill in the Matrix

constructive algorithms, implementation

All the Vowels Please

constructive algorithms, math, number theory

Soldier and Number Game

constructive algorithms, dp, math, number theory

Fence Painting

brute force, constructive algorithms, greedy

Fishingprince Plays With Array

constructive algorithms, greedy, implementation, math

Smilo and Monsters

binary search, constructive algorithms, greedy, sortings, two pointers

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

Insert Zero and Invert Prefix

constructive algorithms

New Year's Eve

bitmasks, constructive algorithms, number theory

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Build the Permutation

constructive algorithms, greedy

StORage room

bitmasks, brute force, constructive algorithms, greedy

Nastya Is Playing Computer Games

constructive algorithms, math

Baby Ehab Partitions Again

bitmasks, constructive algorithms, dp, math

Ice and Fire

constructive algorithms, dp, greedy

Ehab the Xorcist

bitmasks, constructive algorithms, greedy, number theory

Coloring

constructive algorithms, greedy, math

Knights

constructive algorithms, greedy

Timofey and cubes

constructive algorithms, implementation

Dishonest Sellers

constructive algorithms, greedy, sortings

Row Major

constructive algorithms, greedy, math, number theory, strings

Say No to Palindromes

brute force, constructive algorithms, dp, strings

ABBC or BACB

constructive algorithms, greedy

Rectangle Filling

constructive algorithms, implementation

Ehab and a Special Coloring Problem

constructive algorithms, number theory

Vladik and fractions

brute force, constructive algorithms, math, number theory

Spy-string

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

Definite Game

constructive algorithms, math

Omkar and Heavenly Tree

constructive algorithms, trees

Sum on Subarrays

constructive algorithms, greedy, math

Lord of the Values

constructive algorithms

Column Swapping

brute force, constructive algorithms, greedy, implementation, sortings

Exam

constructive algorithms, implementation, math

Jumping Through Segments

binary search, constructive algorithms

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Unforgivable Curse (hard version)

brute force, constructive algorithms, dfs and similar, dsu, graphs, greedy, strings

Bear and Five Cards

constructive algorithms, implementation

Unforgivable Curse (easy version)

brute force, constructive algorithms, dsu, graphs, greedy, strings

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Tile Painting

constructive algorithms, math, number theory

Insert and Equalize

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

Bessie and MEX

constructive algorithms, math

Permutation Operations

constructive algorithms, greedy, implementation, math

No More Inversions

constructive algorithms, math

Madoka and Childish Pranks

constructive algorithms, greedy

Bear and Prime 100

constructive algorithms, interactive, math

Circle Coloring

constructive algorithms

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Increasing Sequence

constructive algorithms, implementation, math

Klever Permutation

constructive algorithms, math, two pointers

Palindromifier

constructive algorithms, strings

Carousel

constructive algorithms, dp, graphs, greedy, math

Gardener and the Array

bitmasks, constructive algorithms

Restoring the Permutation

constructive algorithms, implementation

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Ehab and Prefix MEXs

brute force, constructive algorithms, greedy

Twist the Permutation

brute force, constructive algorithms, implementation, math

Longest Regular Bracket Sequence

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

Flipper

brute force, constructive algorithms, greedy

Prefix Flip (Hard Version)

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

Easter Eggs

constructive algorithms, implementation

Friends and Gifts

constructive algorithms, data structures, math

Grid-00100

constructive algorithms, greedy, implementation

Doremy's IQ

binary search, constructive algorithms, greedy, implementation

Putting Bricks in the Wall

constructive algorithms, implementation

Hossam and Friends

binary search, constructive algorithms, dp, two pointers

Rings

constructive algorithms, math

Unequal Array

constructive algorithms, greedy, implementation

Zero-One (Easy Version)

constructive algorithms, greedy, math

Square Filling

constructive algorithms, greedy, implementation

Ehab and Path-etic MEXs

constructive algorithms, dfs and similar, greedy, trees

Even Picture

constructive algorithms

Balance the Bits

constructive algorithms, greedy

Elimination of a Ring

constructive algorithms, greedy, implementation

Morning Jogging

constructive algorithms, greedy, sortings

Fillomino 2

constructive algorithms, dfs and similar, greedy, implementation

Moderate Modular Mode

constructive algorithms, math, number theory

Another Problem About Dividing Numbers

constructive algorithms, math, number theory

Game with Chips

constructive algorithms, implementation

Non-Coprime Partition

constructive algorithms, math

Far Relative’s Birthday Cake

brute force, combinatorics, constructive algorithms, implementation

Suffix Operations

constructive algorithms, implementation

Factorials and Powers of Two

bitmasks, brute force, constructive algorithms, dp, math