Omkar and Pies

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

Converging Array (Hard Version)

dp, math

Expected Components

combinatorics, math, number theory, probabilities

Coins Exhibition

data structures, dp, math

Multithreading (Easy Version)

combinatorics, fft, math

Tubular Bells

interactive, math, number theory, probabilities

Anti-Increasing Addicts

constructive algorithms, dp, greedy, math

RC Kaboom Show

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

Ruminations on Ruminants

geometry, math

Festival Organization

combinatorics, math, number theory

GCD Master (easy version)

greedy, math, number theory, sortings

Fibonacci Number

brute force, math, matrices

Triangle Platinum?

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

Basis

combinatorics, fft, math, number theory

Bear and Chase

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

Johnny and James

greedy, implementation, math, trees

Long Binary String

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

Jzzhu and Squares

dp, math, number theory

A Creative Cutout

brute force, combinatorics, math

GCD Master (hard version)

greedy, math, sortings

Evaluate RBS

data structures, geometry, implementation, math, sortings

Bitonix' Patrol

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

Gears

brute force, geometry, math

Digital Patterns

combinatorics, data structures, implementation, math

Kirchhoff's Current Loss

math

Hero to Zero

graph matchings, math

Chess Championship

constructive algorithms, flows, greedy, math

Strange Triples

brute force, math, number theory

Last Number

combinatorics, math

Deducing Sortability

binary search, bitmasks, math

Mixture

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

Security System

math

Finding Expected Value

math

Jumbled Trees

constructive algorithms, math

Birthday

geometry, math

Damage per Second

brute force, math

Gosha is hunting

brute force, data structures, dp, flows, math, probabilities, sortings

Pastoral Oddities

data structures, divide and conquer, dsu, math, trees

Lust

combinatorics, math, matrices

Keep XOR Low

bitmasks, combinatorics, data structures, divide and conquer, dp, math

ZS Shuffles Cards

combinatorics, dp, math, probabilities

Tree Weights

bitmasks, constructive algorithms, data structures, dfs and similar, implementation, math, matrices, number theory, trees

Game Relics

math, probabilities

Centroid Probabilities

combinatorics, dp, fft, math

Partial Virtual Trees

combinatorics, dfs and similar, dp, math, trees

Tenzing and Random Real Numbers

bitmasks, dp, graphs, math, probabilities

Mod Mod Mod

binary search, dp, math

AquaMoon and Wrong Coordinate

constructive algorithms, interactive, math

Birthday

constructive algorithms, greedy, math

Around the World

bitmasks, combinatorics, dfs and similar, dp, graphs, graphs, math, trees

Omkar and Time Travel

data structures, math

Red and Black Tree

dp, implementation, math

Game Bundles

brute force, constructive algorithms, dp, greedy, math

A Stroll Around the Matrix

data structures, greedy, math

Equal Product

data structures, math, number theory, two pointers

Lasers and Mirrors

constructive algorithms, math

The Thorny Path

greedy, math

Random Ranking

dp, math, probabilities

Jellyfish and Hack

dp, math

Doodle Jump

math, number theory

Chess

math, shortest paths

Antifibonacci Cut

bitmasks, combinatorics, constructive algorithms, data structures, dp, hashing, math

1 2 3 4 ...

dp, math, matrices

Sequence Transformation

brute force, data structures, dp, implementation, math

Alice and the Cactus

dfs and similar, graphs, math, probabilities

Circle of Numbers

math

Flow Optimality

constructive algorithms, flows, math

Student's Camp

dp, math

Surprise me!

divide and conquer, math, number theory, trees

Koxia and Sequence

bitmasks, combinatorics, dp, math, number theory

2-Coloring

combinatorics, dp, math

LCC

data structures, math, matrices, probabilities

Max Correct Set

bitmasks, dp, math

Raffles

data structures, dp, greedy, math

Move by Prime

combinatorics, math, number theory

Circles of Waiting

math

Drazil and His Happy Friends

math, number theory

Berserk Robot

constructive algorithms, math, sortings

Perpetual Subtraction

fft, math, matrices

Slime and Sequences (Easy Version)

dp, fft, math

Xor-Set

bitmasks, divide and conquer, math

Xor Permutations

constructive algorithms, math

Computer Game

dp, greedy, math, probabilities

Survival of the Weakest (hard version)

greedy, math, sortings, two pointers

Bosco and Particle

dp, math, number theory, strings

Perfect Encoding

fft, math

Permanent

dp, graph matchings, math, meet-in-the-middle

Perpetual Motion Machine

constructive algorithms, dp, graphs, implementation, math, trees

Cycle sort

dsu, math

K Paths

combinatorics, data structures, dp, fft, math

Clacking Balls

combinatorics, math, probabilities

Harry The Potter

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

Unique Strings

combinatorics, dp, math

Anti-median (Easy Version)

dp, math

Evil

math

Heidi Learns Hashing (Hard)

fft, math, number theory

Global Warming

geometry, math

DZY Loves Bridges

math, matrices

Again Counting Arrays (Easy Version)

combinatorics, dp, fft, math

String Theory

geometry, math, strings