Circle Perimeter

binary search, brute force, dfs and similar, geometry, implementation, math

Dark Matter

bitmasks, geometry

Disks

dfs and similar, geometry, graph matchings, graphs

Grove

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

Bessie's Birthday Cake (Hard Version)

geometry, greedy, math

Bessie's Birthday Cake (Easy Version)

geometry, greedy, math

Draw Polygon Lines

*special problem, constructive algorithms, dp, geometry, interactive

Grand Finale: Circles

binary search, geometry

Find a Mine

binary search, constructive algorithms, geometry, greedy, interactive, math

Rectangle Cutting

geometry, math

Vlad and Shapes

geometry, implementation

Fractal Origami

geometry, math, matrices

Smooth Sailing (Hard Version)

binary search, data structures, dsu, geometry, graphs, trees

Mathematical Problem

brute force, constructive algorithms, geometry, math

Innovative Washing Machine

geometry, math, two pointers

Spaceship Exploration

binary search, geometry

Landscaping

binary search, geometry, two pointers

Fear of the Dark

binary search, geometry, math

2D Traveling

geometry, math, shortest paths, sortings

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Evaluate RBS

data structures, geometry, implementation, math, sortings

The Morning Star

combinatorics, data structures, geometry, implementation, math, sortings

Cardboard for Pictures

binary search, geometry, implementation, math

Rudolph and Christmas Tree

constructive algorithms, geometry, math

Come Together

geometry, implementation, math

Tenzing and Triangle

data structures, dp, geometry, greedy, math

Monocarp and a Strategic Game

geometry, sortings, two pointers

Fading into Fog

geometry, interactive, math, probabilities

The Butcher

geometry, greedy, implementation, sortings, two pointers

Ian Visits Mary

constructive algorithms, geometry, number theory

Not a Geometry Problem

*special problem, *special problem, constructive algorithms, geometry, math

Walking Master

geometry, greedy, math

Place for a Selfie

binary search, data structures, geometry, math

City Union

constructive algorithms, dfs and similar, dsu, geometry, greedy, implementation, math

Ideal Point

brute force, geometry, greedy

Following Directions

geometry, implementation

Codeforces Scoreboard

binary search, data structures, dp, geometry

Parallel Projection

geometry, math

Spinach Pizza

games, geometry, greedy, interactive

Vittorio Plays with LEGO Bricks

dp, geometry

Chemistry Lab

dp, geometry, probabilities

Olympiad Training

binary search, data structures, dp, flows, geometry, implementation, sortings

Arranging Crystal Balls

data structures, divide and conquer, divide and conquer, dp, geometry, graphs, number theory

Jumbo Extra Cheese 2

geometry, greedy, sortings

Equal Binary Subsequences

constructive algorithms, geometry, greedy, implementation, strings

Pebbles and Beads

data structures, geometry

Meeting on the Line

binary search, geometry, greedy, implementation, math, ternary search

Mainak and the Bleeding Polygon

binary search, geometry, implementation, math

Garage

binary search, geometry, math

Circular Mirror

binary search, combinatorics, geometry, math, two pointers

Crop Squares

constructive algorithms, geometry, interactive, math

Long Way Home

data structures, divide and conquer, dp, geometry, graphs, greedy, shortest paths

Traveling Salesman Problem

geometry, greedy, implementation

Rain

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

Coloring

brute force, combinatorics, constructive algorithms, dp, geometry, graphs, greedy, implementation, math

Fishingprince Plays With Array Again

brute force, data structures, geometry, math

Lena and Matrix

data structures, dp, geometry, shortest paths

Very Suspicious

binary search, brute force, geometry, greedy, implementation, math

Interactive Treasure Hunt

brute force, constructive algorithms, geometry, interactive, math

Global Warming

geometry, math

Connect the Points

brute force, constructive algorithms, geometry

Pandemic Restrictions

geometry, ternary search

Weird Sum

combinatorics, data structures, geometry, math, matrices, sortings

Hard Way

geometry

Covering Circle

geometry

Spaceship Crisis Management

binary search, data structures, geometry, sortings

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Construct a Rectangle

geometry, math

Triangles on a Rectangle

geometry, greedy, math

Representative Edges

brute force, geometry, implementation, math

Shortest path

brute force, geometry, math, shortest paths

Training Session

combinatorics, data structures, geometry, implementation, math

Eligible Segments

geometry

Interactive Rays

geometry, interactive

Framing Pictures

geometry

Managing Telephone Poles

data structures, geometry

Building an Amusement Park

binary search, geometry

Polygon

binary search, dp, geometry

Laser Beams

*special problem, geometry, probabilities

Maximize the Intersections

combinatorics, constructive algorithms, geometry, greedy, sortings

Manhattan Subarrays

brute force, geometry, greedy, implementation

Gregor and the Odd Cows (Hard)

brute force, geometry, math, number theory

Gregor and the Odd Cows (Easy)

bitmasks, geometry, math, number theory

Contest Start

combinatorics, geometry, greedy, math

Omkar and Akmar

chinese remainder theorem, combinatorics, constructive algorithms, fft, games, geometry, math, meet-in-the-middle, string suffix structures

A New Beginning

data structures, dp, geometry, sortings

Off by One

constructive algorithms, dfs and similar, geometry, graphs, sortings, trees

Fly Around the World

dp, geometry

Phoenix and Puzzle

brute force, geometry, math, number theory

Swap Pass

constructive algorithms, geometry, sortings

Balance the Cards

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

Diamond Miner

geometry, greedy, math, sortings

Eastern Exhibition

binary search, geometry, shortest paths, sortings

Nezzar and Nice Beatmap

constructive algorithms, geometry, greedy, math, sortings

Plane Tiling

geometry, implementation, math

Hobbits

binary search, geometry

Full Turn

geometry, hashing, number theory

Bovine Dilemma

brute force, geometry, math

Four Points

brute force, constructive algorithms, flows, geometry, greedy, implementation, math, ternary search

Circle Game

games, geometry, math