The Beaver's Problem - 3

Entertaining Geodetics

brute force, dsu, implementation

Expected Twist

*special problem, interactive

Balance the Cards

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation

Balls and Pockets

data structures

Black and White

constructive algorithms

Snow sellers

greedy, sortings

Global Warming

geometry, math

What a Reversal

constructive algorithms

Quantum Classification - 1

*special problem

Flowers and Chocolate

combinatorics, math, matrices

Hongcow Masters the Cyclic Shift

strings, two pointers

The Beaver's Problem - 3

Optimizations From Chelsu

divide and conquer, dp, number theory, trees

Restaurant Game

Finding the Vertex

brute force, dfs and similar, dp, interactive, trees

To Hack or not to Hack

brute force, dp, greedy

Polynom

*special problem, implementation

Multiple of Three Cycles

combinatorics, data structures, dp, dsu, math

Olympic Team Building

brute force, meet-in-the-middle

Late For Work (submissions are not allowed)

data structures, greedy, schedules, shortest paths

Toys

greedy, strings

Two IP Cameras

*special problem, math, number theory

Dreamoon and Notepad

data structures

The Tournament

greedy

Escaping on Beaveractor

graphs

Candy Shop

greedy

Last Number

combinatorics, math

Problems for Codeforces

combinatorics, fft, math

Dušan's Railway

divide and conquer, graphs, trees

Boboniu and Banknote Collection

strings

Контрольная сумма

*special problem

The Fraction

*special problem

Clever Fat Rat

dp

Anti-Proxy Attendance

constructive algorithms, dp, interactive, ternary search

Tree Diameter

interactive, trees

Maximum Permutation

constructive algorithms

Differentiating Games

games, interactive

Distinguish three-qubit states

Planar Perimeter

constructive algorithms, graphs

Design Tutorial: Learn from a Game

constructive algorithms, implementation

Arithmancy (Medium)

constructive algorithms, interactive, probabilities, strings

Willy-nilly, Crack, Into Release!

data structures, dp

Round Table

math

Show Must Go On

binary search, brute force, greedy, shortest paths

Array Sum

*special problem

Colored Jenga

dfs and similar, dp, probabilities

Greedy Petya

*special problem, dfs and similar, graphs, greedy

Darts

geometry, probabilities

Contingency Plan 2

graph matchings

Viruses

*special problem, dp, shortest paths, string suffix structures

Knightmare (easy)

graphs, interactive, shortest paths

Visible Black Areas

data structures, dsu, geometry, trees

Maximal Difference

*special problem

Duck Hunt

data structures

Almost Certainly

*special problem, constructive algorithms, data structures, sortings

Interactive Mex Tree

constructive algorithms, dfs and similar, interactive, trees

LuoTianyi and Cartridge

data structures, trees

Goats and Wolves

greedy

Interesting Sequence

math

Nezzar and Chocolate Bars

combinatorics, fft, math, probabilities

Quantum Classification - 2

*special problem

Don't Exceed

math, probabilities

Tram

Inverse Function

implementation

Xor-quiz

constructive algorithms, dp, interactive, math, number theory

Quantum Classification - Dataset 3

Upside Down

data structures, string suffix structures, strings, trees

Verifying Kingdom

binary search, divide and conquer, interactive, trees

Counting Fridays

*special problem

Triskaidekaphobia

*special problem

Organizing a Music Festival

dfs and similar, math

Beauty of a Permutation

constructive algorithms, math

Helper

Again Counting Arrays (Easy Version)

combinatorics, dp, fft, math

Freak Joker Process

binary search, data structures, sortings

Balanced Distribution

data structures, dp, greedy

Optimizer

graphs, greedy, hashing, implementation

JS Minification

greedy, implementation

Marmots (hard)

math, probabilities

Ancient civilizations

constructive algorithms, geometry

El Toll Caves

math

Hex Dyslexia

bitmasks, brute force, dp, graphs

Tanya is 5!

graph matchings, graphs, greedy, schedules

...Dary!

binary search, geometry, two pointers

Points in triangle

*special problem, geometry

Fox and Meteor Shower

geometry

Deducing Sortability

binary search, bitmasks, math

Painting Numbers

*special problem, data structures, greedy, number theory

Mixture

*special problem, data structures, geometry, math, sortings

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Hongcow Draws a Circle

geometry

DZY Loves Bridges

math, matrices

Game with Two Trees

data structures

Security System

math

Clubstep

binary search, brute force, data structures, greedy, trees

Ela and Prime GCD

constructive algorithms, math, number theory

Optimal Encoding

brute force, data structures

Nezzar and Tournaments

data structures, greedy

Permutation Concatenation

string suffix structures