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

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

Prison Transfer

data structures, implementation

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

Three Parts of the Array

binary search, data structures, two pointers

Watchmen

data structures, geometry, math

Misha and Changing Handles

data structures, dsu, strings

Game with string

data structures, implementation, math

Cells Not Under Attack

data structures, math

Snacktower

data structures, implementation

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Balanced Tunnel

data structures, sortings, two pointers

Build a Contest

data structures, implementation

Color the Fence

data structures, dp, greedy, implementation

Table Tennis

data structures, implementation

NEKO's Maze Game

data structures, dsu, implementation

Lecture Sleep

data structures, dp, implementation, two pointers

Bad Sequence

data structures, greedy

Replacement

constructive algorithms, data structures, implementation

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Lunar New Year and a Wander

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

Beautiful Numbers

data structures, implementation, math, two pointers

Greg and Array

data structures, implementation

New Year and Ascent Sequence

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

Game of Credit Cards

data structures, dp, greedy, sortings

Candies!

data structures, dp, implementation, math

Sonya and Queries

data structures, implementation

The Festive Evening

data structures, implementation

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

Knight Tournament

data structures, dsu

Cd and pwd commands

*special problem, data structures, implementation

Stack of Presents

data structures, implementation

Distinct Characters Queries

data structures

Valeriy and Deque

data structures, implementation

Sereja and Brackets

data structures, schedules

Alternating Current

data structures, greedy, implementation

Catch Overflow!

data structures, expression parsing, implementation

Friends and Gifts

constructive algorithms, data structures, math

Chat Order

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

Coffee Break

binary search, data structures, greedy, two pointers

Welfare State

binary search, brute force, data structures, sortings

Bus of Characters

data structures, greedy, implementation

Powers of Two

brute force, data structures, implementation, math

Powerful array

data structures, implementation, math, two pointers

Stripe

data structures, implementation

Modulo Sum

combinatorics, data structures, dp, two pointers

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

Hyperset

brute force, data structures, implementation

Lunar New Year and Food Ordering

data structures, implementation

Photo to Remember

*special problem, data structures, dp, implementation

Playlist

brute force, data structures, sortings

Producing Snow

binary search, data structures

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Longest Regular Bracket Sequence

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

Anya and Smartphone

constructive algorithms, data structures, implementation

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Destroying Array

data structures, dsu

MEX maximizing

data structures, math

Glass Carving

binary search, data structures, implementation

Maximum Absurdity

data structures, dp, implementation

Lorenzo Von Matterhorn

brute force, data structures, implementation, trees

New Reform

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

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Cows and Sequence

constructive algorithms, data structures, implementation

Alyona and Spreadsheet

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

Dima and Staircase

data structures, implementation

Minimize the error

data structures, greedy, sortings

T-shirt buying

data structures, implementation

Order Book

data structures, greedy, implementation, sortings

Good Substrings

data structures, strings

Vasiliy's Multiset

binary search, bitmasks, data structures, trees

Marvolo Gaunt's Ring

brute force, data structures, dp

Vasya and Basketball

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

Berland Fair

binary search, brute force, data structures, greedy

Cat Party (Easy Edition)

data structures, implementation

Okabe and Boxes

data structures, greedy, trees

Mike and Feet

binary search, data structures, dp, dsu

Replace To Make Regular Bracket Sequence

data structures, expression parsing, math

Bubble Sort Graph

binary search, data structures, dp

Little Elephant and Array

constructive algorithms, data structures

Yet Another Monster Killing Problem

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

Heap Operations

constructive algorithms, data structures, greedy

A and B and Interesting Substrings

data structures, dp, two pointers

Misha and Forest

constructive algorithms, data structures, greedy, sortings, trees

Bear and Blocks

binary search, data structures, dp, math

Two TVs

data structures, greedy, sortings

Milking cows

data structures, greedy