Automatic Door

implementation

Table Tennis

data structures, implementation

Borya's Diagnosis

implementation

Teams Formation

data structures, implementation

Alex and broken contest

implementation, strings

Divisiblity of Differences

implementation, math, number theory

National Property

2-sat, dfs and similar, graphs, implementation

Sorting the Coins

dsu, implementation, sortings, two pointers

Balanced Substring

dp, implementation

Chores

implementation

Search for Pretty Integers

brute force, implementation

The Artful Expedient

brute force, implementation

Huge Strings

bitmasks, brute force, dp, implementation, strings

Race Against Time

implementation

Bark to Unlock

brute force, implementation, strings

Between the Offices

implementation

Make a Permutation!

greedy, implementation, math

Bus

greedy, implementation, math

Polycarp and Letters

brute force, implementation, strings

Fair Game

implementation, sortings

Yet Another Array Queries Problem

data structures, implementation

1-2-3

graphs, implementation

Quasi-palindrome

brute force, implementation

Mahmoud and Ehab and the MEX

greedy, implementation

Declined Finalists

greedy, implementation

Tests Renumeration

greedy, implementation

Polycarp's phone book

data structures, implementation, sortings

Did you mean...

dp, greedy, implementation

Which floor?

brute force, implementation

Tom Riddle's Diary

brute force, implementation, strings

Bathroom terminal

implementation

Digits

brute force, implementation, math

Arpa and a research in Mexican wave

implementation, math

Arpa and a list of numbers

implementation, number theory

Odds and Ends

implementation

Rooter's Song

constructive algorithms, data structures, geometry, implementation, sortings, two pointers

Weather Tomorrow

implementation, math

Travel Cards

greedy, implementation, sortings

Noise Level

dfs and similar, implementation, math

University Classes

implementation

Union of Doubly Linked Lists

implementation

Curriculum Vitae

brute force, implementation

Luba And The Ticket

brute force, greedy, implementation

Chess Tourney

implementation, sortings

Diversity

greedy, implementation, strings

Sorting by Subsequences

dfs and similar, dsu, implementation, math, sortings

Generous Kefa

brute force, implementation

Game of the Rows

brute force, greedy, implementation

Arya and Bran

implementation

Vasya's Function

binary search, implementation, math

Two Seals

brute force, implementation

Flag of Berland

brute force, implementation

Text Volume

implementation

Star sky

dp, implementation

The Festive Evening

data structures, implementation

The Useless Toy

implementation

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Strange Radiation

binary search, implementation, math

Petya and Exam

implementation, strings

Keyboard Layouts

implementation, strings

Unimodal Array

implementation

Perpetual Motion Machine

constructive algorithms, dp, graphs, implementation, math, trees

Bamboo Partition

brute force, data structures, implementation, math, number theory, sortings, two pointers

Cards Sorting

data structures, implementation, sortings

Black Square

implementation

Restaurant Tables

implementation

High Load

constructive algorithms, greedy, implementation, trees

Suitable Replacement

binary search, greedy, implementation

Multi-judge Solving

greedy, implementation

Five-In-a-Row

brute force, implementation

Binary Protocol

implementation

Hacker, pack your bags!

binary search, greedy, implementation, sortings

Crossword solving

brute force, implementation, strings

I'm bored with life

implementation, math, number theory

Okabe and Future Gadget Laboratory

implementation

Mister B and Book Reading

implementation

Mister B and PR Shifts

data structures, implementation, math

Multicolored Cars

data structures, implementation

Sofa Thief

brute force, implementation

Permutation Game

implementation

Diplomas and Certificates

implementation, math

Makes And The Product

combinatorics, implementation, math, sortings

Treasure Hunt

implementation, math, number theory

Karen and Coffee

binary search, data structures, implementation

Karen and Morning

brute force, implementation

Karen and Neighborhood

binary search, constructive algorithms, implementation

Karen and Game

brute force, greedy, implementation

An abandoned sentiment from past

constructive algorithms, greedy, implementation, sortings

The Contest

implementation

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Sagheer and Crossroads

implementation

Vladik and Memorable Trip

dp, implementation

Vladik and Complicated Book

implementation, sortings

Vladik and Courtesy

brute force, implementation

Straight <<A>>

implementation, math

Do you want a date?

implementation, math, sortings

Array Division

binary search, data structures, implementation

Average Sleep Time

data structures, implementation, math

Lucky Year

implementation

T-Shirt Hunt

brute force, implementation