BerSU Ball

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

Sereja and Dima

greedy, 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

Books

binary search, brute force, implementation, two pointers

New Theatre Square

brute force, dp, greedy, implementation, two pointers

Boats Competition

brute force, greedy, two pointers

Ternary String

binary search, dp, implementation, two pointers

XXXXX

brute force, data structures, number theory, two pointers

Pair of Topics

binary search, data structures, sortings, two pointers

Letters

binary search, implementation, two pointers

Zero Remainder Array

math, sortings, two pointers

Shuffle

math, two pointers

Kefa and Company

binary search, sortings, two pointers

Queries about less or equal elements

binary search, data structures, sortings, two pointers

Most socially-distanced subsequence

greedy, two pointers

RationalLee

greedy, math, sortings, two pointers

Strange Birthday Party

binary search, dp, greedy, sortings, two pointers

Broken Keyboard

brute force, strings, two pointers

Three Parts of the Array

binary search, data structures, two pointers

Good String

brute force, dp, greedy, two pointers

Number of Pairs

binary search, data structures, math, two pointers

Special Elements

brute force, implementation, two pointers

Dominated Subarray

greedy, implementation, sortings, strings, two pointers

Balanced Team

sortings, two pointers

Vasya and String

binary search, dp, strings, two pointers

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Lecture Sleep

data structures, dp, implementation, two pointers

Points on Line

binary search, combinatorics, 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 width

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

Prefix Flip (Hard Version)

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

Beautiful Numbers

data structures, implementation, math, two pointers

DZY Loves Sequences

dp, implementation, two pointers

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Eugene and an array

binary search, data structures, implementation, two pointers

Unstable String

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

Kuroni and Simple Strings

constructive algorithms, greedy, strings, two pointers

George and Round

brute force, greedy, two pointers

Complete the Word

greedy, two pointers

Another Problem on Strings

binary search, brute force, dp, math, strings, two pointers

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Escape from Stones

constructive algorithms, data structures, implementation, two pointers

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

They Are Everywhere

binary search, strings, two pointers

Checkposts

dfs and similar, graphs, two pointers

Minimize The Integer

greedy, two pointers

String Transformation 1

dsu, graphs, greedy, sortings, strings, trees, two pointers

Counting Kangaroos is Fun

binary search, greedy, sortings, two pointers

Three Blocks Palindrome (easy version)

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

Alice, Bob and Chocolate

greedy, two pointers

TV Subscriptions (Hard Version)

implementation, two pointers

Count Triangles

binary search, implementation, math, two pointers

Kirill And The Game

brute force, two pointers

Tokitsukaze and Discard Items

implementation, two pointers

Brutality

greedy, sortings, two pointers

Building a Fence

dp, greedy, implementation, two pointers

Approximating a Constant Range

dp, implementation, two pointers

Uniqueness

binary search, brute force, implementation, two pointers

Powerful array

data structures, implementation, math, two pointers

Phoenix and Socks

greedy, sortings, two pointers

Functions again

dp, two pointers

Modulo Sum

combinatorics, data structures, dp, two pointers

MP3

sortings, two pointers

Physics Practical

binary search, dp, sortings, two pointers

Coffee Break

binary search, data structures, greedy, two pointers

Zigzags

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

A Tale of Two Lands

binary search, sortings, two pointers

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Discrete Acceleration

binary search, dp, implementation, math, two pointers

Wrath

greedy, implementation, two pointers

Swap Adjacent Elements

dfs and similar, greedy, math, sortings, two pointers

String Deletion

binary search, data structures, greedy, two pointers

Vasya and Arrays

greedy, two pointers

The Best Vacation

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

Cleaning the Phone

binary search, dp, sortings, two pointers

Guess a number!

greedy, implementation, two pointers

Yet Another Yet Another Task

data structures, dp, implementation, two pointers

Ladder

dp, implementation, two pointers

Hard Process

binary search, dp, two pointers

Heaters

greedy, two pointers

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Born This Way

binary search, brute force, two pointers

Strings of Power

implementation, strings, two pointers

Yet Another Monster Killing Problem

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

Cellular Network

binary search, implementation, two pointers

Close Tuples (hard version)

binary search, combinatorics, implementation, math, sortings, two pointers

To Add or Not to Add

binary search, sortings, two pointers

K-Dominant Character

binary search, implementation, two pointers

Two Platforms

binary search, dp, sortings, two pointers

Eugeny and Play List

binary search, implementation, two pointers

Remove the Substring (hard version)

binary search, greedy, implementation, two pointers

Array

bitmasks, implementation, two pointers

Alyona and Spreadsheet

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