Doctor

binary search, math, sortings

Unsorting Array

brute force, sortings

Reducing Fractions

implementation, math, number theory, sortings

Ray Tracing

greedy, hashing, implementation, math, number theory, sortings

New Year Contest

greedy, sortings

Queue

constructive algorithms, greedy, sortings

Ryouko's Memory Note

implementation, math, sortings

Prime Swaps

greedy, sortings

Let's Go Rolling!

dp, sortings

Jury Meeting

greedy, sortings, two pointers

Winter Is Coming

dp, greedy, sortings

Naming Company

games, greedy, sortings

Foe Pairs

combinatorics, sortings, two pointers

Vanya and Computer Game

binary search, implementation, math, sortings

The Union of k-Segments

greedy, sortings

Median on Segments (Permutations Edition)

sortings

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Nested Segments

data structures, sortings

Set To Max (Hard Version)

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

Maximum Distance

dsu, graphs, shortest paths, sortings

Petya and Exam

greedy, sortings, two pointers

Imbalanced Arrays

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

Robot Vacuum Cleaner

greedy, sortings

Thematic Contests

greedy, sortings

Shift and Reverse

greedy, sortings

Too Easy Problems

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

Frets On Fire

binary search, sortings

Clique Problem

data structures, dp, greedy, implementation, sortings

Dirty Deeds Done Dirt Cheap

greedy, sortings

Too Many Segments (hard version)

data structures, greedy, sortings

Colored Balls

combinatorics, dp, math, sortings

Restore Graph

dfs and similar, graphs, sortings

Recover it!

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

K Balanced Teams

dp, sortings, two pointers

Rudolf and Imbalance

binary search, greedy, sortings, two pointers

Bicycles

graphs, greedy, implementation, shortest paths, sortings

Maximize the Intersections

combinatorics, constructive algorithms, geometry, greedy, sortings

Buying gifts

data structures, greedy, sortings

Two Teams

data structures, implementation, sortings

Mark and Lightbulbs

combinatorics, constructive algorithms, greedy, math, sortings

Ugly Pairs

dfs and similar, greedy, implementation, sortings, strings

Maximum AND

bitmasks, dfs and similar, divide and conquer, greedy, sortings

Prefix Purchase

greedy, implementation, sortings

Boboniu Chats with Du

dp, greedy, sortings, two pointers

Andrey and Escape from Capygrad

binary search, data structures, dp, dsu, greedy, sortings

Office Keys

binary search, brute force, dp, greedy, sortings

Path Queries

divide and conquer, dsu, graphs, sortings, trees

String Coloring (easy version)

constructive algorithms, dp, graphs, greedy, sortings

Messenger in MAC

binary search, brute force, constructive algorithms, data structures, dp, greedy, sortings

New Year's Problem

binary search, greedy, sortings

Rescue Nibel!

combinatorics, data structures, sortings

Two Platforms

binary search, dp, sortings, two pointers

Polycarp and String Transformation

binary search, implementation, sortings, strings

Task On The Board

constructive algorithms, greedy, implementation, sortings

Garland

dp, greedy, sortings

Book

binary search, brute force, data structures, dp, graphs, implementation, sortings

Maximum Distributed Tree

dfs and similar, dp, greedy, implementation, math, number theory, sortings, trees

Pashmak and Parmida's problem

data structures, divide and conquer, sortings

Cleaning the Phone

binary search, dp, sortings, two pointers

Chef Monocarp

dp, flows, graph matchings, greedy, math, sortings

Colored Rectangles

dp, greedy, sortings

Ice Cream

*special problem, greedy, sortings

Zebra Tower

*special problem, data structures, greedy, sortings

Spider's Web

binary search, sortings, two pointers

Average Score

greedy, math, sortings

Yet Another Task with Queens

sortings

Discounts

constructive algorithms, greedy, sortings

Resource Distribution

binary search, implementation, sortings

Wilbur and Points

combinatorics, greedy, sortings

Pick Heroes

greedy, implementation, interactive, sortings

Find Pair

implementation, math, sortings

XK Segments

binary search, math, sortings, two pointers

Railway System

constructive algorithms, graphs, greedy, interactive, sortings

Report

data structures, sortings

Road to Cinema

binary search, greedy, sortings

String Reconstruction

data structures, greedy, sortings, strings

Dasha and Very Difficult Problem

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

Petya's Exams

greedy, implementation, sortings

Firecrackers

binary search, sortings

One-Dimensional Battle Ships

binary search, data structures, greedy, sortings

Recommendations

data structures, greedy, sortings

Crazy Diamond

constructive algorithms, sortings

Exams

binary search, greedy, sortings

Medium Design

brute force, data structures, dp, greedy, sortings

Monotonic Renumeration

combinatorics, sortings

Devu and his Brother

binary search, sortings, ternary search, two pointers

Fixed Prefix Permutations

binary search, bitmasks, data structures, hashing, math, sortings

Lexicographically Largest

binary search, constructive algorithms, data structures, greedy, sortings

Covered Points Count

data structures, implementation, sortings

Ira and Flamenco

combinatorics, constructive algorithms, data structures, implementation, math, sortings, two pointers

Doremy's Connecting Plan

constructive algorithms, greedy, math, sortings

Yet Another Monster Killing Problem

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

The Smallest String Concatenation

sortings, strings

Long Inversions

brute force, greedy, implementation, sortings

Boris and His Amazing Haircut

constructive algorithms, data structures, dp, dsu, greedy, sortings

Correct Placement

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

Quiz Master

binary search, math, number theory, sortings, two pointers

Neutral Tonality

constructive algorithms, greedy, sortings, two pointers

Johnny and Contribution

constructive algorithms, graphs, greedy, sortings

Arithmetic Progression

implementation, sortings