Hero to Zero

graph matchings, math

Cactus to Tree

dp, graphs, trees

Kirchhoff's Current Loss

math

Mahmoud and Ehab and the final stage

data structures, strings

Bakery

data structures, dsu

Two Rooted Trees

data structures, implementation, trees

Cactus Not Enough

dfs and similar, graph matchings, graphs

Wavy numbers

brute force, dfs and similar, meet-in-the-middle, sortings

Mister B and Beacons on Field

number theory

Digital Patterns

combinatorics, data structures, implementation, math

Mister B and Astronomers

number theory

Sheep

binary search, greedy

Pebbles and Beads

data structures, geometry

Karen and Neighborhood

binary search, constructive algorithms, implementation

Gears

brute force, geometry, math

Meta-universe

data structures

Lucky Pair

combinatorics, data structures, implementation

Take Metro

brute force, data structures, graphs

Problem of offices

constructive algorithms, dfs and similar, dp, trees

Tape Programming

data structures, implementation

Bitonix' Patrol

bitmasks, brute force, combinatorics, dfs and similar, math

Symmetric Projections

geometry

Evaluate RBS

data structures, geometry, implementation, math, sortings

Strange Function

dp

GCD Master (hard version)

greedy, math, sortings

A Creative Cutout

brute force, combinatorics, math

Subsequences Return

dp, matrices

Jzzhu and Squares

dp, math, number theory

PalindORme

combinatorics, dp

Wrap Around

dp, strings

Divide Powers

constructive algorithms, greedy

Long Binary String

bitmasks, math, matrices, meet-in-the-middle, number theory

Johnny and James

greedy, implementation, math, trees

Tree or not Tree

data structures, divide and conquer, implementation, trees

TOF

dfs and similar, graphs

Bearish Fanpages

Basis

combinatorics, fft, math, number theory

Bear and Chase

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

Triangle Platinum?

brute force, combinatorics, implementation, interactive, math, probabilities

Fibonacci Number

brute force, math, matrices

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

GCD Master (easy version)

greedy, math, number theory, sortings

Sherlock and the Encrypted Data

bitmasks, combinatorics, dp

New task

data structures

Almost Same Distance

dfs and similar, graphs

Festival Organization

combinatorics, math, number theory

MEX Game 2 (Easy Version)

binary search, brute force, greedy

Ruminations on Ruminants

geometry, math

Numbers

Linear Congruential Generator

number theory

RC Kaboom Show

binary search, brute force, data structures, geometry, math

May Holidays

data structures, trees

Substring Search

bitmasks, brute force, fft

Snowy Mountain

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

Cut Length

geometry

Sereja and Squares

dp

Ones

dp, greedy, shortest paths

Distinctification

data structures, dsu, greedy

Shake It!

combinatorics, dp, flows, graphs

Anti-Increasing Addicts

constructive algorithms, dp, greedy, math

Pollywog

combinatorics, dp, matrices

Graph Coloring (hard version)

brute force, combinatorics, divide and conquer, dp, fft, graphs

Tubular Bells

interactive, math, number theory, probabilities

Multithreading (Easy Version)

combinatorics, fft, math

Andrew and Chemistry

dp, hashing, trees

Two Segments

data structures

Playing Around the Table

constructive algorithms, greedy, implementation

Nanami's Power Plant

flows

Forbidden Value

data structures, dp

Cakes for Clones

dp

Group Division

constructive algorithms, dfs and similar, graphs, greedy

Coins Exhibition

data structures, dp, math

Tiles for Bathroom

data structures, sortings, two pointers

Expected Components

combinatorics, math, number theory, probabilities

New Year and Cake

geometry, two pointers

Cycles in product

combinatorics, divide and conquer, trees

Chattering

Noble Knight's Path

data structures, trees

Converging Array (Hard Version)

dp, math

Transferring Pyramid

dp

Fence

binary search, data structures, string suffix structures

Omkar and Pies

bitmasks, dfs and similar, dp, math, shortest paths

Red-Blue Graph

constructive algorithms, flows

Doctor's Brown Hypothesis

dfs and similar, graphs, math, number theory

Tree and XOR

strings, trees

Electric Charges

binary search, dp

Black Widow

dp, graphs, implementation, math

Phys Ed Online

data structures, dp, greedy

Lazy Numbers

binary search, math

Satanic Panic

dp, geometry

Timofey and our friends animals

data structures, divide and conquer, dsu

Nauuo and Portals

constructive algorithms

Make Square

math

Large Refrigerator

brute force

Family Photos

games, greedy

List Generation

combinatorics, dp, math

Reclamation

dsu

Tree Elimination

dp, trees

Fox And Polygon

constructive algorithms, divide and conquer

Mashtali and Hagh Trees

combinatorics, dp, trees