Spaceship Crisis Management

binary search, data structures, geometry, sortings

Sort the Table

*special problem, sortings

Origami

geometry, math, sortings

Snow sellers

greedy, sortings

Roads

*special problem, geometry, sortings

Table Bowling

*special problem, sortings

Mixture

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

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Lost Nodes

constructive algorithms, dp, graphs, interactive, sortings, trees

Little Brother

binary search, geometry, sortings

Phoenix and Diamonds

binary search, data structures, sortings

Caramel Clouds

data structures, dp, sortings

Row of Models

greedy, sortings

Array sorting

*special problem, sortings

Slalom

data structures, dp, sortings

Phoenix and Bits

bitmasks, brute force, data structures, sortings

Strange Sort

data structures, sortings

Minimize Inversions Number

data structures, greedy, math, sortings

Wavy numbers

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

MCMF?

data structures, flows, graphs, greedy, sortings, two pointers

Omkar and Tours

data structures, divide and conquer, sortings, trees

Furukawa Nagisa's Tree

binary search, divide and conquer, sortings, trees

Triangles 3000

geometry, sortings

A Story of One Country (Hard)

brute force, greedy, sortings

Looking for Owls

binary search, data structures, geometry, hashing, sortings

Rainbow Rectangles

data structures, sortings, two pointers

Representative Sampling

dp, sortings, strings

Inquisition

geometry, implementation, sortings

Blog Post Rating

data structures, sortings

Item World

brute force, implementation, sortings

Tree Calendar

brute force, constructive algorithms, data structures, dfs and similar, sortings, trees

Selling Numbers

dp, sortings

Bonus Distribution

*special problem, binary search, greedy, sortings

Transportation

greedy, sortings, two pointers

A New Beginning

data structures, dp, geometry, sortings

The Potion of Great Power

*special problem, 2-sat, binary search, data structures, graphs, interactive, sortings, two pointers

Property

greedy, sortings

Drone Photo

combinatorics, math, sortings

Tiles for Bathroom

data structures, sortings, two pointers

Roland and Rose

brute force, geometry, math, sortings

Donkey and Stars

data structures, dp, geometry, math, sortings

Cannon

data structures, geometry, sortings

Mike and code of a permutation

constructive algorithms, data structures, graphs, sortings

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

Minimum Difference

data structures, hashing, sortings, two pointers

Tourists

data structures, sortings

New Year Tree Decorations

geometry, schedules, sortings

Swap Pass

constructive algorithms, geometry, sortings

Adilbek and the Watering System

data structures, greedy, sortings

The Cells on the Paper

binary search, implementation, sortings

New Year Snowflake

geometry, sortings

Uncle Bogdan and Projections

data structures, geometry, sortings

Unordered Swaps

constructive algorithms, dfs and similar, graphs, greedy, math, sortings, trees

Gripping Story

binary search, data structures, sortings

Berserk Robot

constructive algorithms, math, sortings

A Serious Referee

bitmasks, brute force, dfs and similar, sortings

Employment

greedy, sortings

Maximum Waterfall

data structures, dp, graphs, sortings

A Story of One Country (Easy)

brute force, divide and conquer, sortings

Optimizer

data structures, greedy, sortings

Cartoons

*special problem, implementation, sortings

Baby Ehab's Hyper Apartment

binary search, graphs, interactive, sortings, two pointers

Runaway to a Shadow

geometry, sortings

Ice Cream

*special problem, greedy, sortings

Bug in Code

binary search, data structures, sortings

Four Divisors

data structures, dp, math, number theory, sortings, two pointers

Ancient Language

graphs, sortings

Kay and Eternity

brute force, implementation, sortings

Need For Brake

binary search, greedy, sortings

Camping Groups

data structures, sortings

Printer

binary search, data structures, implementation, sortings

Buses and People

binary search, data structures, sortings

Renovation

constructive algorithms, greedy, sortings

Castle

dp, greedy, probabilities, sortings, trees

A Shade of Moonlight

binary search, geometry, math, sortings, two pointers

Perun, Ult!

brute force, greedy, sortings

Boboniu and Jianghu

dp, greedy, sortings, trees

Bear and Paradox

binary search, greedy, math, sortings

The Doctor Meets Vader (Medium)

flows, graph matchings, graphs, shortest paths, sortings

Place Your Ad Here

data structures, sortings

Sereja and Straight Lines

binary search, data structures, geometry, sortings, two pointers

Rearrange

brute force, constructive algorithms, graphs, greedy, sortings

Petya and Tree

binary search, dfs and similar, probabilities, sortings, trees

Moon Craters

dp, sortings

Lucky Tickets

binary search, data structures, sortings, two pointers

Conveyor

sortings, two pointers

Large Triangle

binary search, geometry, sortings

Spring Cleaning

*special problem, greedy, sortings

Katya and Segments Sets

data structures, interactive, sortings

Map

data structures, implementation, sortings

Geometers Anonymous Club

data structures, geometry, math, sortings

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

Guard Duty (medium)

binary search, dp, greedy, sortings

Lucky Sorting

constructive algorithms, sortings

Teams Forming

*special problem, sortings

Vasya and Endless Credits

dp, flows, graph matchings, graphs, sortings

Max Sum Array

combinatorics, constructive algorithms, greedy, sortings

Volcanoes

binary search, implementation, sortings, two pointers

Parade

data structures, sortings

Wilbur and Trees

dp, math, probabilities, sortings