Ilya and Diplomas

greedy, implementation, math

Skier

data structures, implementation

Hate "A"

implementation, strings

Mike and Feet

binary search, data structures, dp, dsu

Squats

implementation

Good Matrix Elements

implementation

Canvas Frames

implementation

Convert to Ones

brute force, greedy, implementation, math

Arithmetic Progression

implementation, sortings

Add on a Tree

trees

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Bus of Characters

data structures, greedy, implementation

Points on the line

brute force, greedy, sortings

Rebranding

implementation, strings

Maxim Buys an Apartment

constructive algorithms, math

Xenia and Weights

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

Slime

dp, greedy, implementation

Guessing the Greatest (hard version)

binary search, interactive

Alyona and flowers

constructive algorithms

You Are So Beautiful

data structures

Tokitsukaze and Strange Inequality

brute force, data structures, dp

Factory

implementation, math, matrices

Stas and the Queue at the Buffet

greedy, math, sortings

Minimum Array

binary search, data structures, greedy

Numbers on the Chessboard

implementation, math

Bargain

combinatorics, dp, math

Chess Placing

implementation

Maximum Product Strikes Back

brute force, implementation, math, two pointers

Ciel and Dancing

greedy

The Very Beautiful Blanket

bitmasks, constructive algorithms

Zoning Restrictions Again

implementation

Circular RMQ

data structures

K-Dominant Character

binary search, implementation, two pointers

Heaters

greedy, two pointers

Rorororobot

binary search, data structures, greedy, math

Ladder

dp, implementation, two pointers

Inscribed Figures

geometry

Azamon Web Services

greedy

Edge Weight Assignment

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

Fake Plastic Trees

dfs and similar, dp, greedy, trees

Menorah

brute force, graphs, greedy, math

Mister B and Book Reading

implementation

Tree Infection

binary search, greedy, sortings, trees

Check the string

implementation

Flag Day

constructive algorithms, implementation

Square-Free Division (easy version)

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

Serval and Toxel's Arrays

combinatorics, dp, implementation, math

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

The Best Vacation

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

Bear and Three Balls

brute force, implementation, sortings

Fly

binary search, math

Mentors

binary search, data structures, implementation

Chores

implementation

Micro-World

greedy, sortings

King's Path

dfs and similar, graphs, hashing, shortest paths

Jzzhu and Cities

graphs, greedy, shortest paths

Task On The Board

constructive algorithms, greedy, implementation, sortings

Far Relative’s Problem

brute force

Okabe and Future Gadget Laboratory

implementation

Koala and Lights

implementation, math, number theory

Three Blocks Palindrome (hard version)

brute force, data structures, dp, two pointers

Ehab and a 2-operation task

constructive algorithms, greedy, math

Correct Solution?

implementation, sortings

Eevee

brute force, implementation, strings

Equate Multisets

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

Waste Sorting

greedy, implementation

Levko and Permutation

constructive algorithms, math, number theory

Manipulating History

constructive algorithms, greedy, strings

Walking Between Houses

constructive algorithms, greedy

Case of Fake Numbers

brute force, implementation

Infinite Fence

greedy, math, number theory

Rudolf and k Bridges

binary search, data structures, dp, two pointers

Coupons and Discounts

constructive algorithms, greedy

Two TVs

data structures, greedy, sortings

Tandem Repeats?

brute force, strings, two pointers

Making a String

greedy, sortings

k-rounding

brute force, math, number theory

Hongcow Builds A Nation

dfs and similar, graphs

Gerald is into Art

constructive algorithms, implementation

Guess the Permutation

constructive algorithms

The Fair Nut and Elevator

brute force, implementation

Walk on Matrix

bitmasks, constructive algorithms, math

Maximum Absurdity

data structures, dp, implementation

Mathematical Problem

brute force, constructive algorithms, geometry, math

Balanced Ternary String

greedy, strings

Sea and Islands

constructive algorithms, implementation

Not Adding

brute force, dp, math, number theory

Common Divisors

brute force, hashing, implementation, math, strings

Pasha and Pixels

brute force

Tanya and Postcard

greedy, implementation, strings

Restaurant Tables

implementation

Painting Fence

divide and conquer, dp, greedy

The Child and Sequence

data structures, math

Pouring Rain

geometry, math

Recursive Queries

binary search, data structures, dfs and similar

Eugeny and Play List

binary search, implementation, two pointers

Short Task

brute force, dp, math, number theory

Vlad and Cafes

Amr and The Large Array

implementation