Sum over all Substrings (Hard Version)

bitmasks, divide and conquer, dp, dsu, greedy, implementation, strings

Sum over all Substrings (Easy Version)

brute force, dp, greedy, strings

Lexicographically Largest

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

Maximise The Score

greedy, sortings

Sasha and the Happy Tree Cutting

bitmasks, brute force, dfs and similar, dp, graphs, greedy, math, trees

Sasha and the Casino

binary search, brute force, constructive algorithms, games, greedy, math

Sasha and the Drawing

constructive algorithms, greedy, math

Sasha and the Beautiful Array

constructive algorithms, greedy, math, sortings

Modular Sequence

brute force, constructive algorithms, dp, graphs, greedy, math, number theory

Lonely Mountain Dungeons

brute force, data structures, greedy, math, ternary search

Equalize

binary search, greedy, sortings, two pointers

Paint Charges

data structures, dp, greedy, math

Microcycle

data structures, dfs and similar, dsu, graphs, greedy, implementation, sortings, trees

Find the Different Ones!

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

Choose the Different Ones!

brute force, greedy, math

Following the String

constructive algorithms, greedy, strings

Make it White

greedy, strings

Vlad and Trouble at MIT

dfs and similar, dp, flows, graphs, greedy, implementation, trees

Vlad and Division

bitmasks, greedy

A Balanced Problemset?

brute force, greedy, math, number theory

We Got Everything Covered!

constructive algorithms, greedy, strings

Did We Get Everything Covered?

constructive algorithms, dp, greedy, shortest paths, strings

Shrink-Reverse

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

Slimes

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

Find B

constructive algorithms, greedy

Monsters Attack!

dp, greedy, implementation

Moving Chips

greedy, implementation

Increasing Subsequences

bitmasks, constructive algorithms, divide and conquer, greedy, math

Closest Cities

greedy, implementation, math

Eat the Chip

brute force, games, greedy, math

Very Different Array

data structures, greedy, sortings, two pointers

Sending Messages

greedy, math

Arranging Cats

greedy, implementation

Square

greedy, math

Summation Game

games, greedy, math, sortings

Satisfying Constraints

brute force, greedy, math

Wine Factory (Hard Version)

data structures, dp, flows, greedy, matrices

Wine Factory (Easy Version)

data structures, greedy

01 Tree

constructive algorithms, data structures, dsu, greedy, sortings, trees

Grouping Increases

data structures, dp, greedy

Plus-Minus Split

greedy

Caterpillar on a Tree

dfs and similar, graphs, greedy, implementation, sortings, trees

XOR-distance

bitmasks, greedy, implementation, math

Minimize Inversions

constructive algorithms, data structures, greedy, implementation, sortings

Brick Wall

constructive algorithms, greedy, implementation, math

Watering an Array

brute force, greedy, implementation, math

Group Division

constructive algorithms, dfs and similar, graphs, greedy

Happy Life in University

data structures, dfs and similar, greedy, trees

Training Before the Olympiad

constructive algorithms, games, greedy, implementation, math

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Romantic Glasses

data structures, greedy, math

Unnatural Language Processing

greedy, implementation, strings

Programming Competition

dfs and similar, dp, graph matchings, greedy, trees

Game with Marbles (Hard Version)

games, greedy, sortings

Game with Marbles (Easy Version)

brute force, games, greedy, sortings

Three Activities

brute force, dp, greedy, implementation, sortings

Quests

greedy, math

Game with Multiset

binary search, bitmasks, brute force, greedy

Pool Records

*special problem, greedy

Build Railway Stations

*special problem, greedy, trees

Remove and Add

*special problem, greedy

Security Guard

*special problem, greedy

Split Plus K

greedy, math, number theory

Heavy Intervals

constructive algorithms, data structures, dsu, greedy, math, sortings

Lights

brute force, constructive algorithms, dfs and similar, graphs, greedy, implementation

Shift and Reverse

greedy, sortings

Removal of Unattractive Pairs

constructive algorithms, greedy, math, strings

Triangle Construction

greedy, math

Largest Subsequence

greedy, strings

Begginer's Zelda

greedy, trees

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Set To Max (Easy Version)

brute force, constructive algorithms, greedy

Collecting Game

binary search, dp, greedy, sortings, two pointers

Geo Game

greedy, interactive, math

Maximum And Queries (hard version)

bitmasks, divide and conquer, dp, greedy

Maximum And Queries (easy version)

binary search, bitmasks, brute force, greedy

Theofanis' Nightmare

constructive algorithms, greedy

StORage room

bitmasks, brute force, constructive algorithms, greedy

Halloumi Boxes

brute force, greedy, sortings

Insert and Equalize

brute force, constructive algorithms, greedy, math, number theory

Getting Points

binary search, brute force, greedy

Compressed Tree

dfs and similar, dp, graphs, greedy, sortings, trees

Yet Another Monster Fight

binary search, dp, greedy, implementation, math

Add, Divide and Floor

constructive algorithms, greedy, math

Chip and Ribbon

greedy, math

Line Trip

greedy, math

Cover in Water

constructive algorithms, greedy, implementation, strings

Alex's whims

constructive algorithms, graphs, greedy, shortest paths, trees

Queue Sort

greedy, implementation, sortings

Yarik and Array

dp, greedy, two pointers

Sofia and Strings

data structures, greedy, sortings, strings, two pointers

Absolute Beauty

greedy, math

Milena and Admirer

greedy, math

Bracket Xoring

constructive algorithms, greedy, implementation, math

Matching Arrays

binary search, constructive algorithms, greedy, sortings

AB Flipping

greedy, strings, two pointers

Two Characters, Two Colors

binary search, data structures, dp, flows, greedy

Infinite Card Game

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

Points and Minimum Distance

greedy, math, sortings

Colorful Constructive

constructive algorithms, data structures, greedy