Colored Balls

combinatorics, dp, math, sortings

Report

data structures, sortings

Case of Fugitive

data structures, greedy, sortings

Median on Segments (Permutations Edition)

sortings

Polycarp's phone book

data structures, implementation, sortings

Set To Max (Hard Version)

constructive algorithms, data structures, divide and conquer, greedy, implementation, sortings

Repetitions Decoding

constructive algorithms, implementation, sortings

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Nested Segments

data structures, sortings

Magic Stones

constructive algorithms, math, sortings

Sereja and Swaps

brute force, sortings

Road to Cinema

binary search, greedy, sortings

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Boring Segments

data structures, sortings, trees, two pointers

Potions Homework

implementation, sortings

Yet Another Division Into Teams

dp, greedy, sortings

Moving Points

data structures, divide and conquer, implementation, sortings

Maximum Distance

dsu, graphs, shortest paths, sortings

Present

binary search, bitmasks, constructive algorithms, data structures, math, sortings

Kate and imperfection

greedy, implementation, math, number theory, sortings, two pointers

Nearest vectors

geometry, sortings

String Reconstruction

data structures, greedy, sortings, strings

Dasha and Very Difficult Problem

binary search, brute force, constructive algorithms, greedy, sortings

Arthur and Table

brute force, data structures, dp, greedy, math, sortings

Anton and Lines

geometry, sortings

Physical Education Lessons

data structures, implementation, sortings

Rescheduling the Exam

binary search, data structures, greedy, implementation, math, sortings

Counting Graphs

combinatorics, divide and conquer, dsu, graphs, greedy, sortings, trees

Sequence

dp, sortings

Page Numbers

expression parsing, implementation, sortings, strings

Cut and Stick

binary search, data structures, greedy, implementation, sortings

Imbalanced Arrays

constructive algorithms, graphs, greedy, math, sortings, two pointers

Petya and Exam

greedy, sortings, two pointers

Pairs of Segments

data structures, greedy, sortings, two pointers

Fire

dp, sortings

Balanced Removals (Harder)

binary search, constructive algorithms, divide and conquer, greedy, implementation, sortings

Searchlights

binary search, brute force, data structures, dp, implementation, sortings, two pointers

XOR Inverse

bitmasks, data structures, divide and conquer, dp, greedy, math, sortings, strings, trees

Robot Vacuum Cleaner

greedy, sortings

Petya's Exams

greedy, implementation, sortings

Taxi drivers and Lyft

implementation, sortings

Another Sorting Problem

data structures, sortings, strings

Lorry

greedy, sortings

Inconvenient Pairs

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

Skyscrapers

implementation, sortings

Shift and Reverse

greedy, sortings

Swaps Again

constructive algorithms, implementation, sortings

Survey in Class

brute force, data structures, greedy, implementation, sortings

Rectangles

geometry, implementation, sortings

Robot Collisions

data structures, greedy, implementation, sortings

Thematic Contests

greedy, sortings

Vanya and Triangles

brute force, combinatorics, data structures, geometry, math, sortings

Cheap Dinner

brute force, data structures, graphs, greedy, implementation, sortings, two pointers

Strange Device

constructive algorithms, interactive, math, sortings

Imbalanced Array

data structures, divide and conquer, dsu, sortings

Paths on the Tree

dfs and similar, dp, greedy, sortings, trees

Teleporters (Hard Version)

binary search, greedy, sortings

Firecrackers

binary search, sortings

Frets On Fire

binary search, sortings

Too Easy Problems

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

Hacker, pack your bags!

binary search, greedy, implementation, sortings

Day at the Beach

sortings

Easy Assembly

greedy, sortings

Restaurant

dp, greedy, sortings

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Clique Problem

data structures, dp, greedy, implementation, sortings

Do you want a date?

implementation, math, sortings

For Gamers. By Gamers.

binary search, brute force, greedy, math, sortings

Checkpoints

greedy, implementation, sortings

Restorer Distance

binary search, greedy, math, sortings, ternary search

Sonya and Problem Wihtout a Legend

dp, sortings

GCD of an Array

brute force, data structures, hashing, implementation, math, number theory, sortings, two pointers

Minimizing Difference

binary search, constructive algorithms, greedy, sortings, ternary search, two pointers

Weights Distributing

brute force, graphs, greedy, shortest paths, sortings

Dances (Hard Version)

binary search, greedy, sortings, two pointers

Dirty Deeds Done Dirt Cheap

greedy, sortings

Too Many Segments (hard version)

data structures, greedy, sortings

Recommendations

data structures, greedy, sortings

Asterism (Easy Version)

binary search, brute force, combinatorics, math, number theory, sortings

Maximum Submatrix 2

data structures, dp, implementation, sortings

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Restore Graph

dfs and similar, graphs, sortings

GCD and MST

constructive algorithms, dsu, graphs, greedy, number theory, sortings

Crazy Diamond

constructive algorithms, sortings

K Balanced Teams

dp, sortings, two pointers

The Doctor Meets Vader (Easy)

binary search, sortings

Maxim and Discounts

greedy, sortings

Semifinals

implementation, sortings

Sorting the Coins

dsu, implementation, sortings, two pointers

Recover it!

dfs and similar, graphs, greedy, number theory, sortings

Finding Team Member

brute force, implementation, sortings

Pashmak and Graph

dp, sortings

Division into Teams

greedy, math, sortings

Network Configuration

greedy, sortings

Growing Mushrooms

greedy, sortings

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Medium Design

brute force, data structures, dp, greedy, sortings

Choosing flowers

binary search, brute force, data structures, dfs and similar, dp, greedy, sortings, two pointers

Exams

binary search, greedy, sortings

Permutation Restoration

binary search, data structures, greedy, math, sortings, two pointers