Quadcopter Competition

Berland.Taxi

data structures

Road Widening

implementation

Renovation

greedy, sortings

Photo Processing

binary search

Palindromic Cut

brute force

Orientation of Edges

graphs

Lost in Transliteration

implementation

Field of Wonders

implementation

Packmen Strike Back

Downloading B++

binary search

Berland Army

Automatic Door

implementation

Ann and Books

data structures, hashing

Danil and a Part-time Job

bitmasks, data structures, trees

Olya and Energy Drinks

data structures, dfs and similar, shortest paths

Slava and tanks

constructive algorithms

Nikita and string

brute force, dp

Alex and broken contest

implementation

Divisiblity of Differences

math

Trip For Meal

math

Royal Questions

dsu, greedy

Delivery Club

binary search, data structures, dp

High Cry

binary search, bitmasks, data structures, divide and conquer

National Property

2-sat, dfs and similar, graphs, implementation

Sorting the Coins

dsu, sortings, two pointers

Classroom Watch

brute force

Forbidden Indices

dsu, string suffix structures, strings

Awards For Contestants

brute force, data structures, dp

Merge Sort

divide and conquer

Strange Game On Matrix

greedy, two pointers

Balanced Substring

dp, implementation

Chores

implementation

Restore the Tree

graphs, greedy, trees

Paths

data structures, number theory

Points, Lines and Ready-made Titles

dfs and similar, dsu, trees

Something with XOR Queries

brute force, probabilities

Maximum splitting

dp, greedy, number theory

Maximum of Maximums of Minimums

greedy

Search for Pretty Integers

brute force

The Untended Antiquity

data structures, hashing

The Overdosing Ubiquity

brute force, dfs and similar, graphs

The Intriguing Obsession

combinatorics, dp, math

The Eternal Immortality

math

The Artful Expedient

brute force, implementation

El Toll Caves

math

Yet Another Minimization Problem

divide and conquer, dp

Policeman and a Tree

dp, graphs, trees

Huge Strings

bitmasks, brute force, dp, strings

Qualification Rounds

bitmasks, brute force, constructive algorithms, dp

Race Against Time

implementation

Bark to Unlock

brute force, strings

Between the Offices

implementation

Flowers and Chocolate

combinatorics, math, matrices

Egg Roulette

bitmasks, brute force, divide and conquer, math, meet-in-the-middle

Hex Dyslexia

bitmasks, brute force, dp, graphs

Buy Low Sell High

constructive algorithms, data structures, greedy

Gotta Go Fast

binary search, dp

Ordering Pizza

binary search, sortings, ternary search

Save the problem!

constructive algorithms

Cities Excursions

dfs and similar

Fire

dp, sortings

Make a Permutation!

greedy, implementation

Bus

greedy, implementation

Polycarp and Letters

brute force, implementation

Fair Game

implementation, sortings

Graphic Settings

Almost Permutation

flows

Turn Off The TV

data structures, sortings

Yet Another Array Queries Problem

data structures, implementation

1-2-3

graphs, implementation

Kayaking

brute force, greedy, sortings

Quasi-palindrome

brute force, implementation

Mahmoud and Ehab and the final stage

data structures, strings

Mahmoud and Ehab and the function

binary search, data structures

Mahmoud and Ehab and the binary string

binary search, divide and conquer

Mahmoud and Ehab and the xor

constructive algorithms

Mahmoud and Ehab and the bipartiteness

dfs and similar, graphs

Mahmoud and Ehab and the MEX

implementation

Arkady and a Nobody-men

data structures, dfs and similar, trees

Circle of Numbers

math

Ordering T-Shirts

greedy

Desk Disorder

combinatorics, dfs and similar, dsu, graphs, trees

Third Month Insanity

dp, probabilities

Pie Rules

dp, games

Lazy Security Guard

brute force, math

Declined Finalists

greedy

Wizard's Tour

constructive algorithms, dfs and similar

Tests Renumeration

implementation

Polycarp's phone book

data structures, sortings

Did you mean...

dp, greedy

Which floor?

brute force

k-rounding

brute force, number theory

To Play or not to Play

Satellites

Masha and Cactus

Eleventh Birthday

combinatorics, dp, math

Similar Words

dp, strings

Set Theory

brute force, constructive algorithms

Harry Vs Voldemort

dp, graphs, trees