Supersequence

*special problem, binary search, greedy

Minesweeper

*special problem, constructive algorithms, greedy

Two Towers

*special problem, greedy, math

Fuzzy Concatenation (Hard version)

binary search, bitmasks, data structures, dp, greedy, string suffix structures

Fuzzy Concatenation (Easy Version)

binary search, bitmasks, brute force, data structures, greedy, string suffix structures

Double Bracket Sequence

data structures, dp, expression parsing, flows, greedy, strings

Parabola Independence

dp, graphs, greedy, math, sortings

Dice Roll Sequence

dp, greedy

The Turtle Strikes Back

dp, graphs, greedy, implementation

Table Cut

constructive algorithms, greedy, implementation

Offshores

greedy, implementation, math

Lawn Mower

greedy, math

Remove the Grail Tree

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

Pizza Delivery

dp, greedy

Replace and Sum

data structures, greedy

Reverse a Permutation

greedy

Swap to Rearrange

constructive algorithms, dfs and similar, graph matchings, graphs, graphs, graphs, greedy, strings

Cost of Tree

dp, greedy, trees, trees

All-in-one Gun

binary search, greedy, math

Comparable Permutations

greedy, implementation, interactive, sortings, two pointers

Sub-RBS (Easy Version)

combinatorics, constructive algorithms, dp, greedy, strings, two pointers

Sorting Game

constructive algorithms, games, greedy

Zhora the Vacuum Cleaner

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

Majority Wins?

constructive algorithms, greedy, math, strings

Little String (Hard Version)

combinatorics, dp, greedy, math, number theory

Little String (Easy Version)

combinatorics, dp, greedy, math, number theory

The Curse of the Frog

constructive algorithms, greedy, math

Table with Numbers

greedy, implementation

Seats

greedy

Many Cartesian Trees

greedy, sortings, trees

Jerry and Tom

data structures, dfs and similar, dsu, games, graphs, greedy, trees

Shortest Statement Ever

bitmasks, constructive algorithms, dp, greedy

Restricted Sorting

greedy, sortings

BattleCows 2

binary search, brute force, data structures, dp, greedy

The Robotic Rush

binary search, greedy, implementation, two pointers

Prefix Max

greedy

Minimise Cost

binary search, dp, greedy, sortings

Snake Instructions

constructive algorithms, greedy, interactive

Tree Coloring (Hard Version)

combinatorics, constructive algorithms, data structures, dfs and similar, greedy, implementation, trees

Tree Coloring (Easy Version)

constructive algorithms, dfs and similar, greedy, trees

War Strategy

binary search, greedy, math, two pointers

Yet Another MEX Problem

constructive algorithms, greedy

Christmas Reindeer (hard version)

bitmasks, brute force, combinatorics, data structures, greedy, math

New Year's Gifts

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

Christmas Tree Decoration

combinatorics, dp, greedy, math

New Year String

constructive algorithms, greedy, implementation, strings

Greta's Game

binary search, dp, graphs, greedy, math

Elevator Against Humanity

brute force, constructive algorithms, greedy, sortings

Battle of Arrays

data structures, games, greedy

No Effect XOR

bitmasks, divide and conquer, dp, greedy, math

Insolvable Disks

data structures, dp, greedy, math

XOR-factorization

bitmasks, constructive algorithms, dp, greedy, number theory

Ashmal

greedy, strings

Blackslex and Penguin Civilization

bitmasks, constructive algorithms, greedy, math

Blackslex and Showering

dp, greedy, implementation

Xmas or Hysteria

constructive algorithms, greedy, implementation, math

First or Second

dp, greedy, implementation

Impost or Sus

dp, greedy, implementation, strings

Yes or Yes

greedy, strings

Remove at the lowest cost

data structures, dfs and similar, dp, dsu, greedy, implementation, trees

Odd Process

greedy, sortings

Optimal Shifts

bitmasks, greedy, strings

Operations with Inversions

greedy, implementation, math

Secret Message

data structures, dp, greedy, trees

Needle in a Haystack

greedy, strings, two pointers

Shiro's Mirror Duel

constructive algorithms, greedy, interactive, probabilities, sortings

Taiga's Carry Chains

bitmasks, brute force, dp, greedy, math

Kanade's Perfect Multiples

brute force, constructive algorithms, greedy, number theory

Niko's Tactical Cards

dp, greedy, math

Sleeping Through Classes

greedy, implementation

Cluster Computing System

graphs, greedy, math

Circles Are Far from Each Other

binary search, greedy

Buses

greedy, sortings

Sakura Adachi and Optimal Sequences

bitmasks, combinatorics, greedy, math

Rae Taylor and Trees (hard version)

binary search, constructive algorithms, data structures, dp, dsu, greedy, implementation, trees

Anisphia Wynn Palettia and Good Permutations

constructive algorithms, greedy, number theory

Rae Taylor and Trees (easy version)

binary search, data structures, dp, dsu, greedy, implementation, trees

Renako Amaori and XOR Game (hard version)

bitmasks, games, greedy

Renako Amaori and XOR Game (easy version)

bitmasks, games, greedy

Almost Roman

constructive algorithms, greedy, implementation

Quotient and Remainder

binary search, greedy, two pointers

Addition on a Segment

greedy, math

Maximum Neighborhood

bitmasks, brute force, greedy, implementation, math

Points Selection

dp, greedy

Removal of a Sequence (Hard Version)

binary search, divide and conquer, greedy, implementation, math, number theory

Range Operation

dp, greedy, math, two pointers

Drifting Away

greedy, implementation

Alice and Bob

greedy, implementation

Locate

binary search, combinatorics, communication, constructive algorithms, greedy, interactive

khba Loves to Sleep!

binary search, data structures, geometry, greedy, implementation

Isamatdin and His Magic Wand!

constructive algorithms, greedy, implementation, sortings

Same Difference

brute force, greedy, strings

Arctic Acquisition

data structures, greedy

Rainbow Branch

constructive algorithms, dp, greedy, trees

Path Split

graph matchings, greedy

Binary Wine

bitmasks, greedy, math

Cyclic Merging

constructive algorithms, greedy

Journey

data structures, dfs and similar, dsu, graphs, greedy

Copy String

greedy, implementation, strings, two pointers

Dungeon

binary search, brute force, data structures, greedy, sortings