Spider's Web

binary search, sortings, two pointers

Processing Queries

*special problem, constructive algorithms, data structures, two pointers

The Tower is Going Home

binary search, two pointers

Nearest Fraction

brute force, implementation, two pointers

XK Segments

binary search, math, sortings, two pointers

Watch the Videos

binary search, constructive algorithms, two pointers

Mysterious Crime

brute force, combinatorics, math, meet-in-the-middle, two pointers

Ones and Twos

binary search, data structures, divide and conquer, math, two pointers

Devu and his Brother

binary search, sortings, ternary search, two pointers

Glider

binary search, data structures, two pointers

Cyclic Rotation

constructive algorithms, greedy, implementation, two pointers

Game Master

data structures, dfs and similar, dp, graphs, greedy, two pointers

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Valiant's New Map

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

Escape The Maze (easy version)

dfs and similar, greedy, shortest paths, trees, two pointers

Remove the Substring (hard version)

binary search, greedy, implementation, two pointers

Yet Another Monster Killing Problem

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

Quiz Master

binary search, math, number theory, sortings, two pointers

Correct Placement

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

Array Painting

constructive algorithms, greedy, two pointers

Tandem Repeats?

brute force, strings, two pointers

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Ladder

dp, implementation, two pointers

String Deletion

binary search, data structures, greedy, two pointers

Close Tuples (hard version)

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

String Transformation 1

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

Three Blocks Palindrome (easy version)

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

Monsters And Spells

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

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

Eugene and an array

binary search, data structures, implementation, two pointers

Constant Palindrome Sum

brute force, data structures, greedy, two pointers

Prefix Flip (Hard Version)

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

Checkposts

dfs and similar, graphs, two pointers

Number of Ways

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

Geometry Horse

greedy, implementation, sortings, two pointers

Hamsters and Tigers

two pointers

Enduring Exodus

binary search, two pointers

Strange Game On Matrix

greedy, two pointers

Convenient For Everybody

binary search, two pointers

Lonely Numbers

binary search, math, number theory, two pointers

Maximum Subrectangle

binary search, implementation, two pointers

Three-level Laser

binary search, greedy, two pointers

Anton and Making Potions

binary search, dp, greedy, two pointers

Primes on Interval

binary search, number theory, two pointers

Alyona and Spreadsheet

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

An impassioned circulation of affection

brute force, dp, strings, two pointers

Vasya and Basketball

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

Born This Way

binary search, brute force, two pointers

Same Count One

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

Seating Arrangements (hard version)

data structures, greedy, implementation, sortings, two pointers

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Maximum Product Strikes Back

brute force, implementation, math, two pointers

To Add or Not to Add

binary search, sortings, two pointers

Longest k-Good Segment

binary search, data structures, two pointers

MP3

sortings, two pointers

Functions again

dp, two pointers

Vasya and Arrays

greedy, two pointers

Hard Process

binary search, dp, two pointers

Coffee Break

binary search, data structures, greedy, two pointers

RGB Substring (hard version)

data structures, dp, implementation, two pointers

Binary String

binary search, greedy, strings, two pointers

Building a Fence

dp, greedy, implementation, two pointers

Tracking Segments

binary search, brute force, data structures, two pointers

PriceFixed

binary search, greedy, implementation, sortings, two pointers

Chocolate Bunny

constructive algorithms, interactive, math, two pointers

Minimize The Integer

greedy, two pointers

Another Problem on Strings

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

Erase and Extend (Easy Version)

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

DZY Loves Sequences

dp, implementation, two pointers

Counting Kangaroos is Fun

binary search, greedy, sortings, two pointers

Maximum Sum of Products

brute force, dp, implementation, math, two pointers

Shifts

brute force, two pointers

Multitasking

greedy, implementation, sortings, two pointers

Sorting the Coins

dsu, implementation, sortings, two pointers

Voting

greedy, implementation, two pointers

The Party and Sweets

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

Array

bitmasks, implementation, two pointers

Heaters

greedy, two pointers

Discrete Acceleration

binary search, dp, implementation, math, two pointers

A Tale of Two Lands

binary search, sortings, two pointers

Uniqueness

binary search, brute force, implementation, two pointers

Phoenix and Socks

greedy, sortings, two pointers

Smilo and Monsters

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

k-Amazing Numbers

binary search, data structures, implementation, two pointers

Cellular Network

binary search, implementation, two pointers

Min Max Sort

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

Close Tuples (easy version)

binary search, combinatorics, math, sortings, two pointers

Backspace

dp, greedy, strings, two pointers

They Are Everywhere

binary search, strings, two pointers

Air Conditioners

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

Price Maximization

binary search, greedy, math, two pointers

Sage's Birthday (hard version)

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

Maximum width

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

Air Conditioner

dp, greedy, implementation, sortings, two pointers

Vasya and String

binary search, dp, strings, two pointers

Good String

brute force, dp, greedy, two pointers

Special Elements

brute force, implementation, two pointers

Kefa and Company

binary search, sortings, two pointers

Polycarp and the Language of Gods

*special problem, implementation, two pointers