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

Meximization

brute force, data structures, greedy, sortings

XXXXX

brute force, data structures, number theory, two pointers

Same Differences

data structures, hashing, math

Phoenix and Beauty

constructive algorithms, data structures, greedy, sortings

Bad Prices

data structures, implementation

Three Indices

brute force, data structures

Hotelier

brute force, data structures, implementation

Rotation Matching

constructive algorithms, data structures, greedy, implementation

Pair of Topics

binary search, data structures, sortings, two pointers

Prefix Flip (Easy Version)

constructive algorithms, data structures, strings

Queries about less or equal elements

binary search, data structures, sortings, two pointers

Yet Another Card Deck

brute force, data structures, implementation, trees

Numbers on Whiteboard

constructive algorithms, data structures, greedy, implementation, math

Polycarp Training

data structures, greedy, sortings

Xenia and Bit Operations

data structures, trees

Element Extermination

constructive algorithms, data structures, greedy

Han Solo and Lazer Gun

brute force, data structures, geometry, implementation, math

Little Girl and Maximum Sum

data structures, greedy, implementation, sortings

Card Deck

data structures, greedy, math

Valerii Against Everyone

constructive algorithms, data structures, greedy, sortings

ABBB

brute force, data structures, greedy, strings

Three Parts of the Array

binary search, data structures, two pointers

Good Subarrays

data structures, dp, math

Social Network (hard version)

data structures, implementation

Binary String To Subsequences

constructive algorithms, data structures, greedy, implementation

Number of Pairs

binary search, data structures, math, two pointers

Applejack and Storages

constructive algorithms, data structures, greedy, implementation

Constructing the Array

constructive algorithms, data structures, sortings

Corrupted Array

constructive algorithms, data structures, greedy

Journey Planning

data structures, dp, greedy, math, sortings

Nastya and Strange Generator

brute force, data structures, greedy, implementation

Epic Transformation

constructive algorithms, data structures, greedy

Snacktower

data structures, implementation

Yet Another Walking Robot

data structures, implementation

Watchmen

data structures, geometry, math

Orac and LCM

data structures, math, number theory

Game with string

data structures, implementation, math

NEKO's Maze Game

data structures, dsu, implementation

Misha and Changing Handles

data structures, dsu, strings

Prison Transfer

data structures, implementation

Lecture Sleep

data structures, dp, implementation, two pointers

Box Fitting

binary search, bitmasks, data structures, greedy

Potions (Easy Version)

brute force, data structures, dp, greedy

Accidental Victory

binary search, data structures, greedy

Balanced Tunnel

data structures, sortings, two pointers

Reading Books (easy version)

data structures, greedy, sortings

Maximum width

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

Berland Regional

brute force, data structures, greedy, number theory, sortings

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Phoenix and Towers

constructive algorithms, data structures, greedy

Color the Fence

data structures, dp, greedy, implementation

Prefix Flip (Hard Version)

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

Beautiful Numbers

data structures, implementation, math, two pointers

Reorder the Array

combinatorics, data structures, math, sortings, 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

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Eugene and an array

binary search, data structures, implementation, two pointers

Potions (Hard Version)

data structures, greedy

Greg and Array

data structures, implementation

Cells Not Under Attack

data structures, math

Bad Sequence

data structures, greedy

Distinct Characters Queries

data structures

Equalize the Array

binary search, data structures, greedy, math, sortings

Stack of Presents

data structures, implementation

Build a Contest

data structures, implementation

New Year and Ascent Sequence

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

Karen and Coffee

binary search, data structures, implementation

Table Tennis

data structures, implementation

MEX maximizing

data structures, greedy, implementation, math

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Minimum Grid Path

brute force, data structures, greedy, math

13th Labour of Heracles

data structures, greedy, sortings, trees

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Knight Tournament

data structures, dsu

Candies!

data structures, dp, implementation, math

Array Destruction

brute force, constructive algorithms, data structures, greedy, implementation, sortings

Three Blocks Palindrome (easy version)

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

Game of Credit Cards

data structures, dp, greedy, sortings

Sereja and Brackets

data structures, schedules

Stripe

data structures, implementation

PolandBall and Game

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

Skyscrapers (easy version)

brute force, data structures, dp, greedy

Diluc and Kaeya

data structures, dp, hashing, number theory

Replacement

constructive algorithms, data structures, implementation

Powerful array

data structures, implementation, math, two pointers

Hyperset

brute force, data structures, implementation

Valeriy and Deque

data structures, implementation

Chat Order

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

Powers of Two

brute force, data structures, implementation, math

Geometric Progression

binary search, data structures, dp

Alternating Current

data structures, greedy, implementation

Longest Regular Bracket Sequence

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

Welfare State

binary search, brute force, data structures, sortings

Modulo Sum

combinatorics, data structures, dp, two pointers