The Closest Pair

constructive algorithms, implementation

Huge Boxes of Animal Toys

constructive algorithms

Mister B and Angle in Polygon

constructive algorithms, geometry, math

An express train to reveries

constructive algorithms

Qualifying Contest

constructive algorithms, sortings

Segments

constructive algorithms, math

Cards

constructive algorithms, dp, math

A Trivial Problem

brute force, constructive algorithms, math, number theory

K-special Tables

constructive algorithms, implementation

Vika and Squares

constructive algorithms, implementation

Students in Railway Carriage

constructive algorithms, greedy, implementation

Lucky Permutation Triple

constructive algorithms, implementation, math

Dividing the numbers

constructive algorithms, graphs, math

Difference Row

constructive algorithms, implementation, sortings

Neko Performs Cat Furrier Transform

bitmasks, constructive algorithms, dfs and similar, math

Sonya and Exhibition

constructive algorithms, greedy, implementation, math

Painting Pebbles

constructive algorithms, greedy, implementation

Labs

constructive algorithms, greedy, implementation

Oh Those Palindromes

constructive algorithms, strings

Salyg1n and the MEX Game

constructive algorithms, data structures, games, greedy, interactive

Bit Flipping

bitmasks, constructive algorithms, greedy, strings

Vasya and Isolated Vertices

constructive algorithms, graphs

Packets

constructive algorithms, greedy, math

Binary String Constructing

constructive algorithms

Fill in the Matrix

constructive algorithms, implementation

Insert Zero and Invert Prefix

constructive algorithms

New Year's Eve

bitmasks, constructive algorithms, number theory

Ice and Fire

constructive algorithms, dp, greedy

Ehab and a Special Coloring Problem

constructive algorithms, number theory

Qingshan Loves Strings 2

constructive algorithms, greedy, implementation

Insert and Equalize

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

Permutation Operations

constructive algorithms, greedy, implementation, math

Madoka and Childish Pranks

constructive algorithms, greedy

Gardener and the Array

bitmasks, constructive algorithms

Divisor Chain

bitmasks, constructive algorithms, math, number theory

Twist the Permutation

brute force, constructive algorithms, implementation, math

Elemental Decompress

constructive algorithms, greedy, implementation, sortings

Sets and Union

bitmasks, brute force, constructive algorithms, greedy

Make Nonzero Sum (easy version)

constructive algorithms, dp, greedy

Arrow Path

brute force, constructive algorithms, dfs and similar, dp, graphs, shortest paths

Knapsack

constructive algorithms, greedy, sortings

Parity Shuffle Sorting

constructive algorithms, sortings

Simple Game

constructive algorithms, games, greedy, implementation, math

Co-growing Sequence

bitmasks, constructive algorithms, greedy

Ice Cream Balls

binary search, combinatorics, constructive algorithms, math

Di-visible Confusion

constructive algorithms, math, number theory

Road Construction

constructive algorithms, graphs

Matching Numbers

constructive algorithms, greedy, math

Pokémon Army (easy version)

constructive algorithms, dp, greedy

Number into Sequence

constructive algorithms, math, number theory

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Nastia and a Good Array

constructive algorithms, math, number theory

Coin Rows

brute force, constructive algorithms, dp, implementation

Social Distance

constructive algorithms, greedy, math

Mere Array

constructive algorithms, math, number theory, sortings

Trouble Sort

constructive algorithms, implementation

Anti-Sudoku

constructive algorithms, implementation

Random Teams

combinatorics, constructive algorithms, greedy, math

Mathematical Analysis Rocks!

constructive algorithms, implementation, math

Amity Assessment

brute force, constructive algorithms, implementation

Maximum Number

*special problem, constructive algorithms, greedy, implementation

Mysterious numbers - 1

*special problem, constructive algorithms

Little Frog

constructive algorithms

Distances to Zero

constructive algorithms

Cards with Numbers

constructive algorithms, sortings

A Tide of Riverscape

constructive algorithms, strings

World Cup

constructive algorithms, implementation

New Year Present

constructive algorithms, implementation

Print Check

constructive algorithms, implementation

Gerald is into Art

constructive algorithms, implementation

Levko and Permutation

constructive algorithms, math, number theory

Maxim Buys an Apartment

constructive algorithms, math

Alyona and flowers

constructive algorithms

Parallelogram is Back

brute force, constructive algorithms, geometry

A Prosperous Lot

constructive algorithms, implementation

Lesha and array splitting

constructive algorithms, greedy, implementation

Unnatural Conditions

constructive algorithms, math

Letters Cyclic Shift

constructive algorithms, greedy, implementation, strings

Row

brute force, constructive algorithms

Serval and Toy Bricks

constructive algorithms, greedy

Box

constructive algorithms

Postcard

constructive algorithms, implementation

Sanatorium

binary search, constructive algorithms, greedy, implementation, math

Diverse Permutation

constructive algorithms, greedy

War of the Corporations

constructive algorithms, greedy, strings

New Year and the Treasure Geolocation

brute force, constructive algorithms, greedy, implementation

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Equalize by Divide

brute force, constructive algorithms, greedy, math

Vladik and flights

constructive algorithms, greedy, implementation

Diameter of Graph

constructive algorithms, graphs, greedy, math

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

Build the Permutation

constructive algorithms, greedy

StORage room

bitmasks, brute force, constructive algorithms, greedy

Dishonest Sellers

constructive algorithms, greedy, sortings

Omkar and Heavenly Tree

constructive algorithms, trees

Easter Eggs

constructive algorithms, implementation

Square Filling

constructive algorithms, greedy, implementation

Morning Jogging

constructive algorithms, greedy, sortings

Restricted RPS

constructive algorithms, dp, greedy

Snow Walking Robot

constructive algorithms, greedy, implementation