Divide and Summarize

binary search, brute force, data structures, divide and conquer, implementation, sortings

Sequence and Swaps

dp, greedy, sortings

Two Editorials

brute force, dp, greedy, sortings, two pointers

Toy Blocks

binary search, greedy, math, sortings

Avoid Trygub

constructive algorithms, sortings

Knapsack

constructive algorithms, greedy, sortings

Array Rearrangment

greedy, sortings

Divide and Sum

combinatorics, math, sortings

The Delivery Dilemma

binary search, greedy, sortings

Saving the City

dp, greedy, math, sortings

Valerii Against Everyone

constructive algorithms, data structures, greedy, sortings

Chef Monocarp

dp, flows, graph matchings, greedy, math, sortings

Barrels

greedy, implementation, sortings

Carrots for Rabbits

binary search, data structures, greedy, math, sortings

Chess Cheater

greedy, implementation, sortings

Avoiding Zero

math, sortings

Non-zero Segments

constructive algorithms, data structures, greedy, sortings

Ancient Language

graphs, sortings

Years

data structures, sortings

Returning Home

graphs, shortest paths, sortings

Rescue Nibel!

combinatorics, data structures, sortings

Cubes Sorting

math, sortings

Sage's Birthday (hard version)

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

Sage's Birthday (easy version)

binary search, constructive algorithms, greedy, sortings

Negative Prefixes

greedy, sortings

Two Arrays

greedy, math, sortings

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Perform Easily

binary search, brute force, dp, implementation, sortings, two pointers

Two Platforms

binary search, dp, sortings, two pointers

Avoid Rainbow Cycles

data structures, dsu, graphs, greedy, sortings, trees

Searchlights

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

Maximum Product

brute force, dp, greedy, implementation, sortings

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Roads

*special problem, geometry, sortings

Fancy Fence

*special problem, data structures, dsu, implementation, math, sortings

Divide Square

data structures, geometry, implementation, sortings

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Mere Array

constructive algorithms, math, number theory, sortings

Yet Another Segments Subset

data structures, dp, graphs, sortings

Weights Division (hard version)

binary search, dfs and similar, greedy, sortings, trees, two pointers

Remove Smallest

greedy, sortings

Two Types of Spells

binary search, data structures, greedy, implementation, math, sortings

Colored Rectangles

dp, greedy, sortings

Substring Removal Game

games, greedy, sortings

Power Sequence

brute force, math, number theory, sortings

Rainbow Rectangles

data structures, sortings, two pointers

Boboniu and Jianghu

dp, greedy, sortings, trees

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Pinkie Pie Eats Patty-cakes

constructive algorithms, greedy, math, sortings

Bicolored Segments

data structures, dp, graph matchings, sortings

Uncle Bogdan and Projections

data structures, geometry, sortings

Mixture

*special problem, data structures, geometry, math, sortings

Rearrange

brute force, constructive algorithms, graphs, greedy, sortings

String Transformation 1

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

Origami

geometry, math, sortings

Mastermind

constructive algorithms, graph matchings, greedy, implementation, sortings, two pointers

Create The Teams

brute force, dp, greedy, implementation, sortings

New Passenger Trams

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

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Inversion SwapSort

constructive algorithms, greedy, sortings

Replace by MEX

brute force, constructive algorithms, sortings

Cyclic Shifts Sorting

brute force, constructive algorithms, implementation, sortings

Reading Books (hard version)

data structures, greedy, implementation, sortings, ternary search, two pointers

Reading Books (easy version)

data structures, greedy, sortings

Zero Remainder Array

math, sortings, two pointers

Asterism (Hard Version)

binary search, combinatorics, dp, math, number theory, sortings

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings

DeadLee

data structures, dfs and similar, greedy, implementation, sortings

RationalLee

greedy, math, sortings, two pointers

Flying Sort (Hard Version)

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

Task On The Board

constructive algorithms, greedy, implementation, sortings

Swaps Again

constructive algorithms, implementation, sortings

Johnny and Grandmaster

greedy, implementation, math, sortings

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Similar Pairs

constructive algorithms, graph matchings, greedy, sortings

Honest Coach

greedy, sortings

Maria Breaks the Self-isolation

greedy, sortings

Restorer Distance

binary search, greedy, math, sortings, ternary search

Young Explorers

dp, greedy, sortings

Summoning Minions

constructive algorithms, dp, flows, graph matchings, greedy, sortings

Constructing the Array

constructive algorithms, data structures, sortings

Two Arrays And Swaps

greedy, sortings

Phoenix and Distribution

constructive algorithms, greedy, sortings, strings

Phoenix and Beauty

constructive algorithms, data structures, greedy, sortings

Spring Cleaning

*special problem, greedy, sortings

Hilbert's Hotel

math, number theory, sortings

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Multiple Testcases

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

Sorted Adjacent Differences

constructive algorithms, sortings

Xenia and Colorful Gems

binary search, greedy, math, sortings, two pointers

Linova and Kingdom

dfs and similar, dp, greedy, sortings, trees

Two Teams Composing

binary search, greedy, implementation, sortings

Middle Class

greedy, sortings

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

Challenges in school №41

brute force, constructive algorithms, games, graphs, greedy, implementation, sortings

Pair of Topics

binary search, data structures, sortings, two pointers

Present

binary search, bitmasks, constructive algorithms, data structures, math, sortings

World of Darkraft: Battle for Azathoth

brute force, data structures, sortings

Journey Planning

data structures, dp, greedy, math, sortings

Team Building

bitmasks, dp, greedy, sortings