Lucky Numbers (Easy Version)

dp, greedy

Fruit Sequences

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

Danger of Mad Snakes

combinatorics, dp, math

Blue and Red of Our Faculty!

divide and conquer, dp

Bubble Cup hypothesis

bitmasks, constructive algorithms, dp, math

Minlexes

dp, greedy, implementation, strings

Swedish Heroes

brute force, dp, implementation

Battle Lemmings

dp, greedy

Split

binary search, data structures, dp, greedy

Cakes for Clones

dp

Bitwise Magic

dp, math

Clusterization Counting

combinatorics, dp, dsu, fft, graphs, trees

Egor in the Republic of Dagestan

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Discrete Centrifugal Jumps

data structures, dp, graphs

Chess Rush

*special problem, combinatorics, dp, implementation, math

Star Trek

*special problem, combinatorics, dfs and similar, dp, games, graphs, matrices, trees

Mercenaries

bitmasks, brute force, combinatorics, dp, dsu, math, two pointers

x-prime Substrings

brute force, dfs and similar, dp, string suffix structures, strings

Clear the Multiset

data structures, divide and conquer, dp, greedy

Yet Another Segments Subset

data structures, dp, graphs, sortings

Controversial Rounds

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

Monster Invaders

dp, greedy, implementation

Boboniu and Jianghu

dp, greedy, sortings, trees

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

ZS Shuffles Cards

combinatorics, dp, math, probabilities

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Directing Edges

dfs and similar, dp, graphs, trees

Bicolored Segments

data structures, dp, graph matchings, sortings

Viruses

*special problem, dp, shortest paths, string suffix structures

Koa and the Beach (Hard Version)

constructive algorithms, dp, greedy, implementation

Strange Operation

combinatorics, data structures, dp

String Transformation 2

bitmasks, dp, graphs, trees

The Majestic Brown Tree Snake

dfs and similar, dp, greedy, trees, two pointers

Strange Addition

data structures, dp, matrices

Inverse Genealogy

constructive algorithms, divide and conquer, dp, math, trees

Sum of Digits

brute force, constructive algorithms, dp, greedy

Omkar and Last Floor

dp, greedy, two pointers

Asterism (Hard Version)

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

BareLee

dfs and similar, dp, games

Breadboard Capacity (easy version)

dp, flows, greedy

Flying Sort (Hard Version)

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

Construct the String

data structures, dp, strings

Jog Around The Graph

binary search, dp, geometry, graphs

Rotating Substrings

dp, strings

Summoning Minions

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

Decreasing Heights

brute force, dp

Slime and Sequences (Hard Version)

dp, fft, math

Slime and Sequences (Easy Version)

dp, fft, math

Slime and Hats

constructive algorithms, dp, greedy

Phoenix and Berries

brute force, dp, greedy, math

Pac-Man 2.0

*special problem, dp

Quantifier Question

dfs and similar, dp, graphs, math

Make It Ascending

bitmasks, brute force, dp

Nastya and Unexpected Guest

dfs and similar, dp, graphs, shortest paths

Nested Rubber Bands

constructive algorithms, dfs and similar, dp, math, trees

Kaavi and Magic Spell

dp, strings

Strange Function

binary search, data structures, dp, greedy

Independent Set

dfs and similar, dp, trees

Letters and Question Marks

bitmasks, dp, string suffix structures

AND Segments

bitmasks, combinatorics, data structures, dp, two pointers

Spiderweb Trees

dp, geometry, trees

Wise Men (Hard Version)

bitmasks, dp, math

Wise Men (Easy Version)

bitmasks, brute force, dp, meet-in-the-middle

Assigning Fares

dp, trees

Reality Show

bitmasks, dp

Treeland and Viruses

data structures, dfs and similar, dp, shortest paths, trees

Team Building

bitmasks, dp, greedy, sortings

Happy New Year

bitmasks, dp, implementation

Autocompletion

data structures, dfs and similar, dp

Strange Function

dp

Tourism

dp, graphs, probabilities

Au Pont Rouge

binary search, dp, strings

Double Elimination

dp, implementation

Cow and Treats

binary search, combinatorics, dp, greedy, implementation, math

Kuroni and Antihype

bitmasks, brute force, dp, dsu, graphs

Animal Observation (hard version)

data structures, dp, greedy

Animal Observation (easy version)

data structures, dp

Erase Subsequences

dp, strings

Nanosoft

binary search, data structures, dp, implementation

Around the World

bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees

Good Contest

combinatorics, dp, probabilities

Nora's Toy Boxes

bitmasks, combinatorics, dp

Chaotic V.

dp, graphs, greedy, math, number theory, trees

Xenon's Attack on the Gangs

combinatorics, dfs and similar, dp, greedy, trees

Making Shapes

dp

Harry The Potter

brute force, constructive algorithms, dp, fft, implementation, math

Delete a Segment

brute force, constructive algorithms, data structures, dp, graphs, sortings, trees, two pointers

Miss Punyverse

dp, greedy, trees

New Year and Handle Change

binary search, dp

New Year Permutations

combinatorics, dp

Cards

combinatorics, dp, math, number theory, probabilities

Tree Elimination

dp, trees

Two Bracket Sequences

dp, strings, two pointers

Happy Cactus

dp

Red-Blue Graph

dp, graphs, math, matrices, meet-in-the-middle

Beautiful Bracket Sequence (easy version)

combinatorics, dp, probabilities

Economic Difficulties

data structures, dfs and similar, dp, flows, graphs, trees

Tournament

brute force, dp, greedy

Antenna Coverage

data structures, dp, greedy, sortings