123-sequence

implementation

Mike and Fun

brute force, dp, greedy, implementation

Dividing the numbers

constructive algorithms, graphs, math

Mike and strings

brute force, dp, strings

TediousLee

dp, graphs, greedy, math, trees

Koxia and Number Theory

brute force, chinese remainder theorem, math, number theory

Multiset

binary search, data structures

Balance (Easy version)

brute force, data structures, implementation, number theory

More Cowbell

binary search, greedy

Strongly Connected City

brute force, dfs and similar, graphs, implementation

Skier

data structures, implementation

Stas and the Queue at the Buffet

greedy, math, sortings

Mike and Feet

binary search, data structures, dp, dsu

Ilya and Diplomas

greedy, implementation, math

Canvas Frames

implementation

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Squats

implementation

You Are So Beautiful

data structures

Zoning Restrictions Again

implementation

Bus of Characters

data structures, greedy, implementation

Good Matrix Elements

implementation

Convert to Ones

brute force, greedy, implementation, math

Arithmetic Progression

implementation, sortings

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Circular RMQ

data structures

Add on a Tree

trees

Minimum Array

binary search, data structures, greedy

Points on the line

brute force, greedy, sortings

Rebranding

implementation, strings

Xenia and Weights

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

Maxim Buys an Apartment

constructive algorithms, math

Guessing the Greatest (hard version)

binary search, interactive

Alyona and flowers

constructive algorithms

Maximum Product Strikes Back

brute force, implementation, math, two pointers

Slime

dp, greedy, implementation

Tokitsukaze and Strange Inequality

brute force, data structures, dp

Inscribed Figures

geometry

The Very Beautiful Blanket

bitmasks, constructive algorithms

Factory

implementation, math, matrices

Tandem Repeats?

brute force, strings, two pointers

Ciel and Dancing

greedy

Bargain

combinatorics, dp, math

K-Dominant Character

binary search, implementation, two pointers

Numbers on the Chessboard

implementation, math

Chess Placing

implementation

Rorororobot

binary search, data structures, greedy, math

Heaters

greedy, two pointers

Serval and Toxel's Arrays

combinatorics, dp, implementation, math

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Edge Weight Assignment

bitmasks, constructive algorithms, dfs and similar, greedy, math, trees

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Ladder

dp, implementation, two pointers

Menorah

brute force, graphs, greedy, math

Tree Infection

binary search, greedy, sortings, trees

Azamon Web Services

greedy

Flag Day

constructive algorithms, implementation

Check the string

implementation

Square-Free Division (easy version)

data structures, dp, greedy, math, number theory, two pointers

Jzzhu and Cities

graphs, greedy, shortest paths

Mister B and Book Reading

implementation

Mentors

binary search, data structures, implementation

The Best Vacation

binary search, brute force, greedy, implementation, two pointers

King's Path

dfs and similar, graphs, hashing, shortest paths

Bear and Three Balls

brute force, implementation, sortings

Fly

binary search, math

Chores

implementation

Correct Solution?

implementation, sortings

Micro-World

greedy, sortings

Task On The Board

constructive algorithms, greedy, implementation, sortings

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Far Relative’s Problem

brute force

Koala and Lights

implementation, math, number theory

Okabe and Future Gadget Laboratory

implementation

Ehab and a 2-operation task

constructive algorithms, greedy, math

Equate Multisets

constructive algorithms, data structures, greedy, math, number theory

Walking Between Houses

constructive algorithms, greedy

Eevee

brute force, implementation, strings

Manipulating History

constructive algorithms, greedy, strings

Hongcow Builds A Nation

dfs and similar, graphs

Levko and Permutation

constructive algorithms, math, number theory

Waste Sorting

greedy, implementation

Two TVs

data structures, greedy, sortings

Case of Fake Numbers

brute force, implementation

Infinite Fence

greedy, math, number theory

Mathematical Problem

brute force, constructive algorithms, geometry, math

Coupons and Discounts

constructive algorithms, greedy

Making a String

greedy, sortings

k-rounding

brute force, math, number theory

24 Game

constructive algorithms, greedy, math

Guess the Permutation

constructive algorithms

The Child and Sequence

data structures, math

Gerald is into Art

constructive algorithms, implementation

Not Adding

brute force, dp, math, number theory

Balanced Ternary String

greedy, strings

Common Divisors

brute force, hashing, implementation, math, strings

Walk on Matrix

bitmasks, constructive algorithms, math

Sea and Islands

constructive algorithms, implementation

The Fair Nut and Elevator

brute force, implementation

Maximum Absurdity

data structures, dp, implementation