President's Office

implementation

Eugene and an array

binary search, data structures, implementation, two pointers

Bear and Five Cards

constructive algorithms, implementation

Pipes

dp, implementation

Array Destruction

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

DZY Loves Sequences

dp, implementation, two pointers

Lunar New Year and Cross Counting

implementation

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Beautiful Numbers

data structures, implementation, math, two pointers

Ostap and Grasshopper

implementation, strings

Chat Online

implementation

A pile of stones

implementation, math

Find the Spruce

brute force, dp, implementation

Permutation Operations

constructive algorithms, greedy, implementation, math

Ehab and subtraction

implementation, sortings

Histogram Ugliness

greedy, implementation, math

Hexadecimal's Numbers

brute force, implementation, math

Super Agent

implementation

Dorms War

brute force, implementation, strings

Take Your Places!

implementation

Cashier

implementation

Increasing Sequence

constructive algorithms, implementation, math

Stripe

data structures, implementation

Benches

binary search, implementation

Equator

implementation

Divisor Subtraction

implementation, math, number theory

Powerful array

data structures, implementation, math, two pointers

Johny Likes Numbers

implementation, math

Vertical Paths

graphs, implementation, trees

Colour the Flag

brute force, implementation

Pineapple Incident

implementation, math

Sleeping Schedule

dp, implementation

XOR-distance

bitmasks, greedy, implementation, math

Restoring the Permutation

constructive algorithms, implementation

Twist the Permutation

brute force, constructive algorithms, implementation, math

Politics

greedy, implementation

Professor GukiZ's Robot

implementation, math

Snowball

implementation

Prefix Flip (Hard Version)

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

Golden Plate

implementation, math

Easter Eggs

constructive algorithms, implementation

Game of Ball Passing

greedy, implementation

Grid-00100

constructive algorithms, greedy, implementation

Polycarp's Practice

greedy, implementation, sortings

Buying A House

brute force, implementation

Doremy's IQ

binary search, constructive algorithms, greedy, implementation

Fighting Tournament

binary search, data structures, implementation, two pointers

Putting Bricks in the Wall

constructive algorithms, implementation

Email from Polycarp

implementation, strings

Luxurious Houses

implementation, math

Nastya and an Array

implementation, sortings

From S To T

implementation, strings

Settlement of Guinea Pigs

greedy, implementation, math

Sleuth

implementation

Unequal Array

constructive algorithms, greedy, implementation

Generous Kefa

brute force, implementation

NEKO's Maze Game

data structures, dsu, implementation

Square Filling

constructive algorithms, greedy, implementation

Happy Birthday, Polycarp!

implementation

King Escape

dfs and similar, graphs, implementation

Mark and His Unfinished Essay

brute force, implementation

Little Girl and Maximum XOR

bitmasks, dp, greedy, implementation, math

Vasya and Wrestling

implementation

Elimination of a Ring

constructive algorithms, greedy, implementation

Alternating Current

data structures, greedy, implementation

Fillomino 2

constructive algorithms, dfs and similar, greedy, implementation

Fixing Typos

greedy, implementation

Coins

implementation

Game with Chips

constructive algorithms, implementation

Three displays

brute force, dp, implementation

Slightly Decreasing Permutations

greedy, implementation

Integers Shop

data structures, greedy, implementation

Magic Powder - 2

binary search, implementation

Far Relative’s Birthday Cake

brute force, combinatorics, constructive algorithms, implementation

Hamiltonian Wall

dp, implementation

Sequence Pair Weight

hashing, implementation, math

Suffix Operations

constructive algorithms, implementation

Nastya and Strange Generator

brute force, data structures, greedy, implementation

The Doors

implementation

Alice and the Cake

data structures, greedy, implementation, sortings

Binary Path

dp, greedy, implementation

Greed

greedy, implementation

Cellular Network

binary search, implementation, two pointers

Beautiful Sets of Points

constructive algorithms, implementation

Tricky Alchemy

implementation

MUH and Sticks

implementation

Glory Addicts

greedy, implementation, sortings

Verse For Santa

binary search, brute force, implementation

Find Extra One

geometry, implementation

Increase Subarray Sums

brute force, dp, greedy, implementation

Protect Sheep

brute force, dfs and similar, graphs, implementation

Game of Life

implementation

Number Game

binary search, data structures, games, greedy, implementation

MEX Repetition

implementation, math

Little Pigs and Wolves

greedy, implementation

Vika and the Bridge

binary search, data structures, greedy, implementation, math, sortings

Easy Number Challenge

implementation, number theory

Snow Walking Robot

constructive algorithms, greedy, implementation

Petya and Staircases

implementation, sortings

Color the Fence

data structures, dp, greedy, implementation