Luba And The Ticket

brute force, greedy, implementation

Room Leader

implementation

Multiples and Power Differences

constructive algorithms, graphs, math, number theory

Coloring Edges

constructive algorithms, dfs and similar, graphs

The Values You Can Make

dp

Asterism (Easy Version)

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

Binary Table (Hard Version)

constructive algorithms, graphs, greedy, implementation

Very Suspicious

binary search, brute force, geometry, greedy, implementation, math

Maximum Submatrix 2

data structures, dp, implementation, sortings

Personalized Cup

Longtail Hedgehog

dp, graphs

The Robot

brute force, implementation

Tree XOR

bitmasks, dfs and similar, dp, greedy, trees

Complete Tripartite

brute force, constructive algorithms, graphs, hashing, implementation

Primal Sport

math, number theory

Generate a String

dfs and similar, dp

Recommendations

data structures, greedy, sortings

Omsk Metro (simple version)

data structures, dfs and similar, dp, graphs, greedy, math, trees

Erase and Extend (Hard Version)

binary search, data structures, greedy, hashing, string suffix structures, strings, two pointers

Jamie and Interesting Graph

constructive algorithms, graphs, shortest paths

Green and Black Tea

constructive algorithms, greedy, math

Chip Move

brute force, dp, math

Magic Odd Square

constructive algorithms, math

Feeding Chicken

constructive algorithms, greedy, implementation

Crazy Robot

dfs and similar, graphs

Restore Graph

dfs and similar, graphs, sortings

Burenka and Traditions (hard version)

data structures, dp, greedy

Primes or Palindromes?

brute force, implementation, math, number theory

Design Tutorial: Inverse the Problem

dfs and similar, dsu, shortest paths, trees

Vlad and Unfinished Business

dfs and similar, dp, greedy, trees

The Contest

implementation

Hashing Trees

constructive algorithms, trees

Clear the Multiset

data structures, divide and conquer, dp, greedy

Little Elephant and Cards

binary search, data structures

From Y to Y

constructive algorithms

Indivisibility

math, number theory

Meeting

implementation

GCD and MST

constructive algorithms, dsu, graphs, greedy, number theory, sortings

Buy a Ticket

data structures, graphs, shortest paths

Bash and a Tough Math Puzzle

data structures, number theory

Maximum And Queries (easy version)

binary search, bitmasks, brute force, greedy

Aerodynamic

geometry

Three-level Laser

binary search, greedy, two pointers

Sagheer, the Hausmeister

bitmasks, brute force, dp

Rocket

binary search, interactive

Unusual Matrix

2-sat, brute force, constructive algorithms

You're Given a String...

brute force, greedy

Array Repetition

binary search, brute force, dsu, implementation, math

Mister B and Angle in Polygon

constructive algorithms, geometry, math

Food on the Plane

implementation, math

Maxim and Discounts

greedy, sortings

Dominant Indices

data structures, dsu, trees

Passable Paths (easy version)

dfs and similar, trees

Semifinals

implementation, sortings

Crazy Diamond

constructive algorithms, sortings

The Doctor Meets Vader (Easy)

binary search, sortings

Number of Subsequences

combinatorics, dp, strings

Madoka and the Best School in Russia

constructive algorithms, dp, math, number theory

Laurenty and Shop

implementation

"Or" Game

brute force, greedy

Useful Decomposition

implementation, trees

Anadi and Domino

brute force, graphs

After Training

data structures, implementation, math

Square Subsets

bitmasks, combinatorics, dp, math

Ksusha the Squirrel

brute force, implementation

Police Stations

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

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Internet Address

implementation, strings

Necklace Assembly

brute force, dfs and similar, dp, graphs, greedy, number theory

Civilization

dfs and similar, dp, dsu, ternary search, trees

Sorting the Coins

dsu, implementation, sortings, two pointers

Hopscotch

geometry, math

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Phone Numbers

implementation, strings

Arpa's weak amphitheater and Mehrdad's valuable Hoses

dfs and similar, dp, dsu

Tournament

bitmasks, brute force, dfs and similar, greedy

Hide and Seek

graphs

Cut and Paste

implementation, math

African Crossword

implementation, strings

Yet Another Subarray Problem

dp, greedy, math

Bad Luck Island

dp, probabilities

Cram Time

greedy

Ones and Twos

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

Little Xor

brute force, implementation

Permutation Graph

binary search, constructive algorithms, data structures, divide and conquer, greedy, shortest paths

Trains

implementation, math

XOR-gun

bitmasks, brute force, constructive algorithms

Controllers

binary search, math

Need for Pink Slips

bitmasks, brute force, dfs and similar, implementation, math, probabilities

Fox And Jumping

bitmasks, brute force, dp, math

Finding Team Member

brute force, implementation, sortings

Zebras

greedy

New Year Tree

bitmasks, data structures, trees

Mike and Cellphone

brute force, constructive algorithms, implementation

Magic Formulas

math

Minimizing the Sum

dp, implementation

Chilly Willy

math, number theory

K Balanced Teams

dp, sortings, two pointers

Annoying Present

greedy, math

The Fair Nut and the Best Path

data structures, dp, trees