Registration System

data structures, hashing, implementation

A and B and Compilation Errors

data structures, implementation, sortings

Sereja and Suffixes

data structures, dp

Number of Ways

binary search, brute force, data structures, dp, two pointers

Bad Prices

data structures, implementation

Hotelier

brute force, data structures, implementation

Frog Jumps

binary search, data structures, dfs and similar, greedy, implementation

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Xenia and Bit Operations

data structures, trees

Polycarp Training

data structures, greedy, sortings

Queries about less or equal elements

binary search, data structures, sortings, two pointers

Social Network (hard version)

data structures, implementation

Pair of Topics

binary search, data structures, sortings, two pointers

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

Three Parts of the Array

binary search, data structures, two pointers

Prison Transfer

data structures, implementation

Watchmen

data structures, geometry, math

Misha and Changing Handles

data structures, dsu, strings

Game with string

data structures, implementation, math

Snacktower

data structures, implementation

NEKO's Maze Game

data structures, dsu, implementation

Cells Not Under Attack

data structures, math

Yet Another Walking Robot

data structures, implementation

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Journey Planning

data structures, dp, greedy, math, sortings

Balanced Tunnel

data structures, sortings, two pointers

Color the Fence

data structures, dp, greedy, implementation

Build a Contest

data structures, implementation

Table Tennis

data structures, implementation

Lecture Sleep

data structures, dp, implementation, two pointers

Bad Sequence

data structures, greedy

Beautiful Numbers

data structures, implementation, math, two pointers

Lunar New Year and a Wander

data structures, dfs and similar, graphs, greedy, shortest paths

New Year and Ascent Sequence

binary search, combinatorics, data structures, dp, implementation, sortings

Greg and Array

data structures, implementation

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Replacement

constructive algorithms, data structures, implementation

Game of Credit Cards

data structures, dp, greedy, sortings

Candies!

data structures, dp, implementation, math

Friends and Gifts

constructive algorithms, data structures, math

Sonya and Queries

data structures, implementation

Stack of Presents

data structures, implementation

Distinct Characters Queries

data structures

The Festive Evening

data structures, implementation

MEX maximizing

data structures, greedy, implementation, math

Knight Tournament

data structures, dsu

PolandBall and Game

binary search, data structures, games, greedy, sortings, strings

Karen and Coffee

binary search, data structures, implementation

Geometric Progression

binary search, data structures, dp

Sereja and Brackets

data structures, schedules

Cd and pwd commands

*special problem, data structures, implementation

Valeriy and Deque

data structures, implementation

Alternating Current

data structures, greedy, implementation

Hyperset

brute force, data structures, implementation

Powers of Two

brute force, data structures, implementation, math

Chat Order

*special problem, binary search, constructive algorithms, data structures, sortings

Catch Overflow!

data structures, expression parsing, implementation

Welfare State

binary search, brute force, data structures, sortings

Stripe

data structures, implementation

Modulo Sum

combinatorics, data structures, dp, two pointers

Coffee Break

binary search, data structures, greedy, two pointers

Powerful array

data structures, implementation, math, two pointers

Bus of Characters

data structures, greedy, implementation

Thor

brute force, data structures, implementation

Recursive Queries

binary search, data structures, dfs and similar

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

Mind Control

brute force, data structures, implementation

Playlist

brute force, data structures, sortings

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Photo to Remember

*special problem, data structures, dp, implementation

Lunar New Year and Food Ordering

data structures, implementation

Producing Snow

binary search, data structures

Longest Regular Bracket Sequence

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

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Destroying Array

data structures, dsu

Anya and Smartphone

constructive algorithms, data structures, implementation

Maximum Absurdity

data structures, dp, implementation

Glass Carving

binary search, data structures, implementation

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

New Reform

data structures, dfs and similar, dsu, graphs, greedy

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

Alyona and Spreadsheet

binary search, data structures, dp, greedy, implementation, two pointers

T-shirt buying

data structures, implementation

Good Substrings

data structures, strings

Dima and Staircase

data structures, implementation

Cows and Sequence

constructive algorithms, data structures, implementation

Vasiliy's Multiset

binary search, bitmasks, data structures, trees

Marvolo Gaunt's Ring

brute force, data structures, dp

Minimize the error

data structures, greedy, sortings

Order Book

data structures, greedy, implementation, sortings

Replace To Make Regular Bracket Sequence

data structures, expression parsing, math

Yet Another Monster Killing Problem

binary search, data structures, dp, greedy, sortings, two pointers

Berland Fair

binary search, brute force, data structures, greedy

Berry Jam

data structures, dp, greedy, implementation

Vasya and Basketball

binary search, brute force, data structures, implementation, sortings, two pointers

Cat Party (Easy Edition)

data structures, implementation

Little Elephant and Array

constructive algorithms, data structures

Mike and Feet

binary search, data structures, dp, dsu

Okabe and Boxes

data structures, greedy, trees