Forgery

implementation

DDoS

*special problem, brute force

Decorate Apple Tree

constructive algorithms, dfs and similar, dp, graphs, greedy, sortings, trees

Pick Heroes

greedy, implementation, interactive, sortings

Divide Candies

math, number theory

Alice and Hairdresser

dsu, implementation

Candies Distribution

constructive algorithms, implementation

Bicolorings

bitmasks, dp

Vasya and Multisets

brute force, dp, greedy, implementation, math

Splitting money

implementation

Space Formula

greedy

Palindrome Pairs

hashing, strings

The Tower is Going Home

binary search, two pointers

Mysterious Crime

brute force, combinatorics, math, meet-in-the-middle, two pointers

Smallest Word

constructive algorithms, greedy, implementation

Array Product

constructive algorithms, greedy, math

Glider

binary search, data structures, two pointers

Coffee Break

binary search, data structures, greedy, two pointers

Shashlik Cooking

dp, greedy, math

Gambling

greedy, sortings

Valid BFS?

dfs and similar, graphs, shortest paths, trees

Equalize

dp, greedy, strings

Reach Median

greedy

Packets

constructive algorithms, greedy, math

Vasya and Arrays

greedy, two pointers

Diagonal Walking v.2

math

Permutation Game

brute force, dp, games

Playing Piano

constructive algorithms, dp

Cram Time

greedy

Curiosity Has No Limits

Vasya and Golden Ticket

implementation

Maximal Intersection

greedy, math, sortings

Many Equal Substrings

implementation, strings

Rectangles

geometry, implementation, sortings

Mouse Hunt

dfs and similar, graphs

Minimum Value Rectangle

greedy

Plasticine zebra

constructive algorithms, implementation

Weakened Common Divisor

brute force, greedy, number theory

Array Restoration

constructive algorithms, data structures

Elections

brute force, greedy

The Phone Number

constructive algorithms, greedy

Segment Occurrences

brute force, implementation

Stars Drawing (Easy Edition)

brute force, dp, greedy

Walking Between Houses

constructive algorithms, greedy

Photo of The Sky

brute force, implementation, math, sortings

Fly

binary search, math

Relatively Prime Graph

brute force, constructive algorithms, graphs, greedy, math

Annoying Present

greedy, math

Minimum Ternary String

greedy, implementation

Reorder the Array

combinatorics, data structures, math, sortings, two pointers

Military Problem

dfs and similar, graphs, trees

Two Strings Swaps

implementation

Polycarp and Div 3

dp, greedy, number theory

Summarize to the Power of Two

brute force, greedy, implementation

Sonya and Robots

constructive algorithms, implementation

Sonya and Exhibition

constructive algorithms, greedy, implementation, math

Coins and Queries

greedy

Intense Heat

brute force, implementation, math

Binary String Constructing

constructive algorithms

Bernstein-Vazirani algorithm

Oracle for majority function

Oracle for f(x) = b * x + (1 - b) * (1 - x) mod 2

Distinguish zero state and plus state with minimum error

Distinguish four 2-qubit states - 2

Distinguish four 2-qubit states

Distinguish GHZ state and W state

Distinguish zero state and W state

Generate superposition of two basis states

Generate superposition of zero state and a basis state

Deutsch-Jozsa algorithm

*special problem

Oracle for f(x) = k-th element of x

*special problem

Distinguish multi-qubit basis states

*special problem

Distinguish Bell states

*special problem

Distinguish plus state and minus state

*special problem

Generate GHZ state

*special problem

Generate Bell state

*special problem

Covered Points Count

data structures, implementation, sortings

Light It Up

greedy

Convert to Ones

brute force, greedy, implementation, math

World Cup

binary search, math

Suit and Tie

greedy, implementation, math

Knights of a Polygonal Table

greedy, implementation, sortings

Two Squares

geometry, implementation

Nastya and a Wardrobe

math

Nastya Studies Informatics

math, number theory

Bishwock

dp, greedy

Candies

binary search, implementation

Graph And Its Complement

constructive algorithms, graphs, implementation

Bracket Sequences Concatenation Problem

implementation

Equal Sums

implementation, sortings

Three displays

brute force, dp, implementation

Fair

graphs, greedy, number theory, shortest paths

Liebig's Barrels

greedy

Finite or not?

implementation, math

Cut 'em all!

dfs and similar, dp, graphs, greedy, trees

Bus of Characters

data structures, greedy, implementation

Useful Decomposition

implementation, trees

Posterized

games, greedy

Marlin

constructive algorithms

Kuro and Walking Route

dfs and similar, trees