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

Frog Jumps

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

Phoenix and Beauty

constructive algorithms, data structures, greedy, sortings

XXXXX

brute force, data structures, number theory, two pointers

Bad Prices

data structures, implementation

Hotelier

brute force, data structures, implementation

Three Indices

brute force, data structures

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Pair of Topics

binary search, data structures, sortings, two pointers

Xenia and Bit Operations

data structures, trees

Polycarp Training

data structures, greedy, sortings

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Element Extermination

constructive algorithms, data structures, greedy

Queries about less or equal elements

binary search, data structures, sortings, two pointers

Social Network (hard version)

data structures, implementation

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Constructing the Array

constructive algorithms, data structures, sortings

Three Parts of the Array

binary search, data structures, two pointers

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Good Subarrays

data structures, dp, math

Journey Planning

data structures, dp, greedy, math, sortings

Watchmen

data structures, geometry, math

Yet Another Walking Robot

data structures, implementation

NEKO's Maze Game

data structures, dsu, implementation

Prison Transfer

data structures, implementation

Snacktower

data structures, implementation

Game with string

data structures, implementation, math

Orac and LCM

data structures, math, number theory

Misha and Changing Handles

data structures, dsu, strings

Reading Books (easy version)

data structures, greedy, sortings

Balanced Tunnel

data structures, sortings, two pointers

Prefix Flip (Hard Version)

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

Cells Not Under Attack

data structures, math

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Color the Fence

data structures, dp, greedy, implementation

Eugene and an array

binary search, data structures, implementation, two pointers

Beautiful Numbers

data structures, implementation, math, two pointers

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Lecture Sleep

data structures, dp, implementation, two pointers

Friends and Gifts

constructive algorithms, data structures, math

Lunar New Year and a Wander

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

Bad Sequence

data structures, greedy

Build a Contest

data structures, implementation

Greg and Array

data structures, implementation

New Year and Ascent Sequence

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

Table Tennis

data structures, implementation

Stack of Presents

data structures, implementation

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Distinct Characters Queries

data structures

MEX maximizing

data structures, greedy, implementation, math

Candies!

data structures, dp, implementation, math

Three Blocks Palindrome (easy version)

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

Game of Credit Cards

data structures, dp, greedy, sortings

Karen and Coffee

binary search, data structures, implementation

Knight Tournament

data structures, dsu

Replacement

constructive algorithms, data structures, implementation

PolandBall and Game

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

Hyperset

brute force, data structures, implementation

Sereja and Brackets

data structures, schedules

Geometric Progression

binary search, data structures, dp

Sonya and Queries

data structures, implementation

Valeriy and Deque

data structures, implementation

Skyscrapers (easy version)

brute force, data structures, dp, greedy

The Festive Evening

data structures, implementation

Stripe

data structures, implementation

Alternating Current

data structures, greedy, implementation

Chat Order

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

Powerful array

data structures, implementation, math, two pointers

Welfare State

binary search, brute force, data structures, sortings

Powers of Two

brute force, data structures, implementation, math

Catch Overflow!

data structures, expression parsing, implementation

Modulo Sum

combinatorics, data structures, dp, two pointers

Coffee Break

binary search, data structures, greedy, two pointers

Bear and Prime Numbers

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

Mind Control

brute force, data structures, implementation

Thor

brute force, data structures, implementation

Cd and pwd commands

*special problem, data structures, implementation

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Longest Regular Bracket Sequence

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

Bus of Characters

data structures, greedy, implementation

Photo to Remember

*special problem, data structures, dp, implementation

Playlist

brute force, data structures, sortings

Recursive Queries

binary search, data structures, dfs and similar

Zigzags

brute force, combinatorics, data structures, math, two pointers

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Lunar New Year and Food Ordering

data structures, implementation

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Producing Snow

binary search, data structures

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Maximum Absurdity

data structures, dp, implementation

Exam in BerSU (hard version)

brute force, data structures, greedy, math

Skier

data structures, implementation

Berry Jam

data structures, dp, greedy, implementation

New Reform

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