Students and Shoelaces

brute force, dfs and similar, graphs, implementation

Game with Telephone Numbers

games, greedy, implementation

Table Tennis

data structures, implementation

Xenia and Divisors

greedy, implementation

Hexadecimal's Numbers

brute force, implementation, math

Stripe

data structures, implementation

Divisor Subtraction

implementation, math, number theory

Easter Eggs

constructive algorithms, implementation

Polycarp's Practice

greedy, implementation, sortings

Email from Polycarp

implementation, strings

Square Filling

constructive algorithms, greedy, implementation

Coins

implementation

Vika and the Bridge

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

Snow Walking Robot

constructive algorithms, greedy, implementation

Sail

brute force, greedy, implementation

Incinerate

binary search, brute force, data structures, implementation, math, sortings

Filya and Homework

implementation, sortings

Devu, the Dumb Guy

implementation, sortings

Make It Ugly

implementation, math

Belted Rooms

graphs, implementation

Chloe and the sequence

binary search, bitmasks, constructive algorithms, implementation

Virus

greedy, implementation, sortings

Game with string

data structures, implementation, math

Trust Nobody

brute force, greedy, implementation, sortings

Find Marble

implementation

Madoka and the Elegant Gift

brute force, constructive algorithms, graphs, implementation

Vitamins

bitmasks, brute force, dp, implementation

Vanya and Books

implementation, math

Christmas Spruce

implementation, trees

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Jellyfish and Game

brute force, games, greedy, implementation

A-B-C Sort

constructive algorithms, implementation, sortings

Perfect Square

brute force, implementation

TL

brute force, greedy, implementation

Stairs

brute force, constructive algorithms, greedy, implementation, math

Corners

greedy, implementation

Rudolf and the Ball Game

dfs and similar, dp, implementation

Weight of the System of Nested Segments

greedy, hashing, implementation, sortings

Bracket Sequence Deletion

greedy, implementation

Training Before the Olympiad

constructive algorithms, games, greedy, implementation, math

Replace and Keep Sorted

dp, implementation, math

Mirror Grid

implementation

Stone Age Problem

data structures, implementation

Double Sort

implementation, sortings

Soldier and Badges

brute force, greedy, implementation, sortings

Flip the Bits

constructive algorithms, greedy, implementation, math

Alphabetic Removals

implementation

Fall Down

dfs and similar, implementation

Andrew and Stones

greedy, implementation

Domino

implementation, math

Little Pony and Sort by Shift

implementation

Three Activities

brute force, dp, greedy, implementation, sortings

Two Bags of Potatoes

greedy, implementation, math

Contrast Value

greedy, implementation

Omkar and Waterslide

greedy, implementation

Permutation Transformation

dfs and similar, divide and conquer, implementation

Lecture Sleep

data structures, dp, implementation, two pointers

Next Test

implementation, sortings

A-B Palindrome

constructive algorithms, implementation, strings

Binary Deque

binary search, implementation, two pointers

Delete Two Elements

data structures, dp, implementation, math, two pointers

Wrong Addition

implementation

Sequence Transformation

greedy, implementation

Collecting Packages

implementation, sortings

Maximum Product

brute force, dp, greedy, implementation, sortings

Building Permutation

greedy, implementation, sortings

Level Statistics

implementation, math

Vlad and a Sum of Sum of Digits

dp, implementation

AccurateLee

greedy, implementation, strings

Yet Another Broken Keyboard

combinatorics, dp, implementation

Sequence with Digits

brute force, implementation, math

Challenging Cliffs

constructive algorithms, greedy, implementation, math

Pleasant Pairs

brute force, implementation, math, number theory

DZY Loves Chessboard

dfs and similar, implementation

Ternary String

binary search, dp, implementation, two pointers

Ternary XOR

greedy, implementation

Pashmak and Garden

implementation

Odd Selection

brute force, implementation, math

Kuriyama Mirai's Stones

dp, implementation, sortings

Flipping Game

brute force, dp, implementation

Worms

binary search, implementation

Chewbaсca and Number

greedy, implementation

Cheap Travel

implementation

Vanya and Lanterns

binary search, implementation, math, sortings

Asterisks

*special problem, implementation

Pentagonal numbers

*special problem, implementation

Carpeting the Room

*special problem, implementation

Username

*special problem, implementation

SMSC

implementation

Orchestra

brute force, implementation

Quiz League

implementation

T-shirts from Sponsor

implementation

Winnie-the-Pooh and honey

implementation, math

Mind the Gap

implementation

Vasya and Public Transport

greedy, implementation

Dima and Guards

implementation

Ternary Logic

implementation, math

Bayan Bus

implementation

Irrational problem

implementation, number theory

Autocomplete

implementation