Guard Duty (medium)

binary search, dp, greedy, sortings

Maximum Control (medium)

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

Yet Another String Matching Problem

fft, math

Puzzling Language

constructive algorithms

Largest Beautiful Number

greedy, implementation

Tree

binary search, dp, trees

Endless Roses Most Beautiful

Big Secret

constructive algorithms, math

Birds

dp

List Of Integers

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

Jamie and To-do List

data structures, interactive, trees

Almost Acyclic Graph

dfs and similar, graphs

New Year and Arbitrary Arrangement

dp, math, probabilities

Seating of Students

brute force, constructive algorithms, math

Clear The Matrix

bitmasks, dp

Swapping Characters

brute force, hashing, implementation, strings

Almost Difference

data structures, math

GCD of Polynomials

constructive algorithms, math

Ralph And His Tour in Binary Country

brute force, data structures, trees

Automatic Door

implementation

High Cry

binary search, bitmasks, combinatorics, data structures, divide and conquer

Huge Strings

bitmasks, brute force, dp, implementation, strings

Almost Permutation

flows

Tests Renumeration

greedy, implementation

Salazar Slytherin's Locket

bitmasks, dp

Product transformation

combinatorics, math, number theory

Arpa and a game with Mojtaba

bitmasks, dp, games

Dog Show

constructive algorithms, data structures, greedy

Winter is here

combinatorics, dp, math, number theory

The Bakery

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

Okabe and City

dfs and similar, graphs, shortest paths

Mister B and Boring Game

games, greedy

Karen and Test

brute force, combinatorics, constructive algorithms, math

Army Creation

binary search, data structures

Glad to see you!

binary search, interactive

Ice cream coloring

constructive algorithms, dfs and similar, greedy

Fake News (medium)

constructive algorithms, strings

Marmots (medium)

math

Anton and Permutation

brute force, data structures

Repairing Of String

*special problem, constructive algorithms

Prairie Partition

binary search, constructive algorithms, greedy, math

Jon and Orbs

dp, math, probabilities

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Radio stations

binary search, data structures

Felicity's Big Secret Revealed

bitmasks, dp

Nikita and stack

data structures

Vladik and chat

brute force, constructive algorithms, dp, implementation, strings

Music in Car

data structures, greedy, two pointers

Vladik and cards

binary search, bitmasks, brute force, dp

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Funny Game

dp, games

80-th Level Archeology

brute force, data structures, greedy, sortings

Award Ceremony

greedy, implementation

Running Over The Bridges

greedy, implementation, math

One-Way Reform

constructive algorithms, dfs and similar, flows, graphs, greedy

Searching Rectangles

binary search, constructive algorithms, interactive

Memory and Scores

combinatorics, dp, math

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Couple Cover

brute force, dp, number theory

Brain Network (hard)

trees

Bear and Tower of Cubes

binary search, dp, greedy

Another Sith Tournament

bitmasks, dp, math, probabilities

Graph Coloring

dfs and similar, graphs

Hungarian Notation

*special problem

Delivery Bears

binary search, flows, graphs

Table Compression

dfs and similar, dp, dsu, graphs, greedy

Intellectual Inquiry

dp, greedy, strings

Bear and Polynomials

hashing, implementation, math

Magic Numbers

dp

Package Delivery

data structures, divide and conquer, greedy

Ants in Leaves

dfs and similar, greedy, sortings, trees

Professor GukiZ and Two Arrays

binary search, two pointers

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

XOR and Favorite Number

data structures

Sum of Remainders

implementation, math, number theory

Square Root of Permutation

combinatorics, constructive algorithms, dfs and similar, graphs, math

Lieges of Legendre

games, math

Beautiful Function

constructive algorithms, math

Super M

dfs and similar, dp, graphs, trees

Three States

dfs and similar, graphs, shortest paths

Duff in the Army

data structures, trees

Run for beer

dfs and similar, shortest paths

Bribes

dfs and similar, graphs, trees

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

President and Roads

dfs and similar, graphs, hashing, shortest paths

Gerald and Giant Chess

combinatorics, dp, math, number theory

Case of Chocolate

data structures

Love Triangles

dfs and similar, dsu, graphs

GukiZ hates Boxes

binary search, greedy

Brackets in Implications

constructive algorithms, greedy, implementation, math

Happy Line

constructive algorithms, greedy, sortings

The Game Of Parity

games

Mike and Frog

brute force, greedy, implementation, math

A Heap of Heaps

brute force, data structures, math, sortings

Demiurges Play Again

dfs and similar, dp, math, trees

Om Nom and Necklace

hashing, string suffix structures, strings

Pluses everywhere

combinatorics, dp, math, number theory

Arthur and Questions

greedy, implementation, math, ternary search

Darth Vader and Tree

dp, matrices

Restoring Numbers

constructive algorithms, math