Synchrophasotron

brute force

Infinite Game

brute force, combinatorics, dp, games, probabilities

Balanced Unshuffle (Medium)

brute force, constructive algorithms, trees

Shaass and Painter Robot

brute force, implementation, number theory

Sign Posts

brute force, geometry, math

Concise and clear

brute force, greedy, implementation, math

Cycle

brute force, dfs and similar, implementation

Plane of Tanks: Duel

brute force, dp, math, probabilities

Chiori and Doll Picking (hard version)

bitmasks, brute force, combinatorics, math

Bob's Beautiful Array

bitmasks, brute force, greedy

Min-Fund Prison (Medium)

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

A Creative Cutout

brute force, combinatorics, math

Interactive Bulls and Cows (Hard)

brute force, constructive algorithms, interactive

Chain Reaction

brute force, geometry

Item World

brute force, implementation, sortings

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

A Story of One Country (Hard)

brute force, greedy, sortings

Familiar Operations

brute force, graphs, math

Inverse Inversions

binary search, brute force, data structures

Physical Education and Buns

brute force, implementation, math

Race

brute force, implementation

Power Defence

brute force, dp, geometry, greedy

Half-sum

brute force, divide and conquer, greedy

Domino

brute force, implementation

Bitonix' Patrol

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

Gregor and the Odd Cows (Hard)

brute force, geometry, math, number theory

Take Metro

brute force, data structures, graphs

Frames

brute force

Robot in Basement

bitmasks, brute force, implementation

Harry The Potter

brute force, constructive algorithms, dp, fft, implementation, math

The Overdosing Ubiquity

brute force, dfs and similar, graphs

Prime Segment

*special problem, brute force, math, number theory

Minimum Diameter

binary search, brute force

Palindromic Hamiltonian Path

brute force, dfs and similar, dp, graphs, hashing

Gears

brute force, geometry, math

Just Kingdom

brute force, data structures, dfs and similar

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Party

bitmasks, brute force, graph matchings

Wavy numbers

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

Supercollider

brute force

Sequence Transformation

brute force, data structures, dp, implementation, math

Two Circles

brute force, data structures, implementation

Two Posters

brute force, data structures, greedy, two pointers

Marek and Matching (hard version)

brute force, probabilities

Divide The Students

brute force

Marek and Matching (easy version)

brute force, probabilities

Игра в Девятку II

*special problem, brute force

Minecraft Series

brute force, two pointers

Weird LCM Operations

brute force, constructive algorithms, number theory

Toys

brute force, combinatorics

The Tournament

brute force

Lift and Throw

brute force

Long sequence

brute force, math, matrices

Tennis Rackets

brute force, geometry

Strange Triples

brute force, math, number theory

Hellish Constraints

brute force, dp, two pointers

Mrs. Hudson's Pancakes

brute force, dp

Maximum Product?

brute force, combinatorics, dp, greedy, implementation, math, two pointers

Blocks and Sensors

brute force

Ali goes shopping

*special problem, brute force, strings

Low Budget Inception

brute force, geometry

The Films

brute force

Entertaining Geodetics

brute force, dsu, implementation

To Hack or not to Hack

brute force, dp, greedy

Olympic Team Building

brute force, meet-in-the-middle

Finding the Vertex

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

Show Must Go On

binary search, brute force, greedy, shortest paths

Hex Dyslexia

bitmasks, brute force, dp, graphs

Clubstep

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

Optimal Encoding

brute force, data structures

Игра в Девятку III

*special problem, brute force

Mark and Spaceship

brute force, dp

The very same Munchhausen

brute force

AquaMoon and Potatoes

brute force, data structures, dp

Lucky Interval

brute force, math

Mateusz and an Infinite Sequence

bitmasks, brute force, dp, strings

Cyclic Hamming (Hard Version)

brute force, dp, fft, math, number theory

Damage per Second

brute force, math

Pills

brute force, flows

Math, math everywhere

brute force, dp, math, meet-in-the-middle, number theory

Grove

brute force, dfs and similar, dp, geometry, probabilities

Cyclic Hamming (Easy Version)

brute force, divide and conquer, dp, fft, math, number theory

Plane of Tanks

brute force, geometry

Ruler Of The Zoo

brute force, data structures

Keep talking and nobody explodes -- easy

bitmasks, brute force, expression parsing

Egg Roulette

bitmasks, brute force, divide and conquer, math, meet-in-the-middle

Railway Construction

brute force, constructive algorithms, data structures, graphs, shortest paths

Rogue-like Game

*special problem, brute force, greedy, two pointers

Next and Prev

brute force, data structures, implementation