Sereja and Dima

greedy, implementation, two pointers

Books

binary search, brute force, implementation, two pointers

BerSU Ball

dfs and similar, dp, graph matchings, greedy, sortings, two pointers

Prepend and Append

implementation, two pointers

Favorite Sequence

implementation, two pointers

Alternating Subsequence

dp, greedy, two pointers

Number of Ways

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

Sasha and Array Coloring

greedy, sortings, two pointers

Cipher Shifer

implementation, strings, two pointers

1D Eraser

greedy, implementation, two pointers

Ternary String

binary search, dp, implementation, two pointers

Long Long

greedy, math, two pointers

Parity Sort

greedy, sortings, two pointers

Boats Competition

brute force, greedy, two pointers

Queries about less or equal elements

binary search, data structures, sortings, two pointers

New Theatre Square

brute force, dp, greedy, implementation, two pointers

Number of Pairs

binary search, data structures, math, two pointers

XXXXX

brute force, data structures, number theory, two pointers

Pair of Topics

binary search, data structures, sortings, two pointers

Black and White Stripe

implementation, two pointers

Kefa and Company

binary search, sortings, two pointers

Ski Resort

combinatorics, math, two pointers

Letters

binary search, implementation, two pointers

Traffic Light

binary search, implementation, two pointers

Eating Candies

binary search, data structures, greedy, two pointers

Challenging Valleys

implementation, two pointers

Zero Remainder Array

math, sortings, two pointers

Pair Programming

greedy, two pointers

Balanced Team

sortings, two pointers

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Shoe Shuffling

constructive algorithms, greedy, implementation, two pointers

Quality vs Quantity

brute force, constructive algorithms, greedy, sortings, two pointers

Three Parts of the Array

binary search, data structures, two pointers

Delete Two Elements

data structures, dp, implementation, math, two pointers

Very Different Array

data structures, greedy, sortings, two pointers

Binary Deque

binary search, implementation, two pointers

Shuffle

math, two pointers

Maximum Sum

brute force, sortings, two pointers

Special Elements

brute force, implementation, two pointers

Lecture Sleep

data structures, dp, implementation, two pointers

RationalLee

greedy, math, sortings, two pointers

Hamon Odyssey

bitmasks, greedy, two pointers

Broken Keyboard

brute force, strings, two pointers

Friends and the Restaurant

greedy, sortings, two pointers

Most socially-distanced subsequence

greedy, two pointers

Good String

brute force, dp, greedy, two pointers

Vasya and String

binary search, dp, strings, two pointers

Dora and Search

constructive algorithms, data structures, two pointers

Find the Different Ones!

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

Yarik and Array

dp, greedy, two pointers

Subtract Operation

data structures, greedy, math, two pointers

Counting Orders

combinatorics, math, sortings, two pointers

Minimize the Thickness

brute force, greedy, math, two pointers

Rebellion

constructive algorithms, greedy, two pointers

Points on Line

binary search, combinatorics, two pointers

Lex String

brute force, greedy, implementation, sortings, two pointers

Unstable String

binary search, dp, greedy, implementation, strings, two pointers

Serval and Inversion Magic

brute force, implementation, strings, two pointers

2^Sort

data structures, dp, sortings, two pointers

Longest Strike

data structures, greedy, implementation, sortings, two pointers

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Schedule Management

binary search, greedy, implementation, two pointers

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Maximum width

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

Meximum Array

binary search, constructive algorithms, greedy, implementation, math, two pointers

Equalize

binary search, greedy, sortings, two pointers

Kalindrome Array

greedy, two pointers

Sage's Birthday (hard version)

binary search, brute force, constructive algorithms, greedy, sortings, two pointers

Balanced Tunnel

data structures, sortings, two pointers

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Good Subarrays (Easy Version)

binary search, data structures, schedules, two pointers

Price Maximization

binary search, greedy, math, two pointers

Grandma Capa Knits a Scarf

brute force, data structures, greedy, strings, two pointers

awoo's Favorite Problem

binary search, constructive algorithms, data structures, greedy, implementation, strings, two pointers

Air Conditioners

data structures, dp, implementation, shortest paths, sortings, two pointers

Money Trees

binary search, greedy, math, two pointers

They Are Everywhere

binary search, strings, two pointers

Backspace

dp, greedy, strings, two pointers

LR-remainders

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

JoJo's Incredible Adventures

math, strings, two pointers

AB Flipping

greedy, strings, two pointers

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Min Max Sort

binary search, brute force, greedy, math, two pointers

Min-Max Array Transformation

binary search, greedy, two pointers

Checkposts

dfs and similar, graphs, two pointers

Alice, Bob and Chocolate

greedy, two pointers

Cellular Network

binary search, implementation, two pointers

Fighting Tournament

binary search, data structures, implementation, two pointers

Prefix Flip (Hard Version)

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

Hossam and Friends

binary search, constructive algorithms, dp, two pointers

Collecting Game

binary search, dp, greedy, sortings, two pointers

Powerful array

data structures, implementation, math, two pointers

Scoring Subsequences

binary search, greedy, math, two pointers

Counting Kangaroos is Fun

binary search, greedy, sortings, two pointers

Beautiful Numbers

data structures, implementation, math, two pointers

DZY Loves Sequences

dp, implementation, two pointers

Erase and Extend (Easy Version)

binary search, brute force, dp, greedy, hashing, implementation, string suffix structures, strings, two pointers

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Klever Permutation

constructive algorithms, math, two pointers

Eugene and an array

binary search, data structures, implementation, two pointers