Interval Coloring

*special problem, greedy, math

Rotate Matrix

*special problem

Sum of Digits of Sums

*special problem, binary search, data structures

Sort the Table

*special problem, sortings

Alternative Reality

geometry

Feed the Golorp

*special problem

Inverse Function

implementation

Пограничные врата

Fibonacci Strings

strings

Escaping on Beaveractor

dfs and similar, implementation

Managing Telephone Poles

data structures, geometry

Domino

brute force, implementation

Looking for Owls

binary search, data structures, geometry, hashing, sortings

The Great Marathon

dp

Ship's Shortest Path

geometry, shortest paths

Send the Fool Further! (hard)

dfs and similar, dp, math, trees

The Potion of Great Power

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

Plane of Tanks: Duel

brute force, dp, math, probabilities

Binary Key

dp, greedy, implementation

Winning Strategy

binary search, graphs, math, shortest paths

Rectangles and Square

brute force, dp

Xor Spanning Tree

divide and conquer, fft, graphs

Berland SU Computer Network

constructive algorithms, dfs and similar, graphs, hashing, trees

Hide-and-Seek

geometry, implementation

Morrowindows

math, number theory

Tractor College

implementation, math, number theory, ternary search

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Expression

dp

Hanger

data structures

Arrangement

bitmasks, dp

Multithreading

constructive algorithms

Pentagon

combinatorics, graphs, matrices

The Great Julya Calendar

dp

Self-exploration

math

2 + 2 != 4

Delivering Carcinogen

binary search, geometry

Masha and Cactus

dp, trees

Hypercatapult Commute

graphs

Theft of Blueprints

graphs, math

Dima and Figure

dp

Cactusophobia

dfs and similar, flows

Little Elephant and Retro Strings

dp

Strange Calculation and Cats

dp, matrices

Gripping Story

binary search, data structures, sortings

Crime Management

dp, graphs, matrices

Track

graphs, greedy, shortest paths

Flatland Fencing

games, math

Great City Saint Petersburg

data structures

Pokermon League challenge

math, probabilities

Constrained Tree

dfs and similar

Gambling Nim

bitmasks, math, matrices, probabilities

Simplified Nonogram

bitmasks, dp, hashing, meet-in-the-middle

Game

games, implementation

Game with Strings

bitmasks, dp, games

Neatness

constructive algorithms, dfs and similar

Two Arrays

binary search, games, graph matchings

Berkomnadzor

data structures, greedy

Ratings and Reality Shows

data structures, two pointers

Chips Puzzle

constructive algorithms, implementation, math

New Year Presents

constructive algorithms, data structures

Good Substrings

string suffix structures

Space Isaac

hashing, number theory

Daleks' Invasion (hard)

data structures, dsu, graphs, trees

Hamming Distance

constructive algorithms, greedy, math, matrices

Collective Mindsets (hard)

Place Your Ad Here

data structures, sortings

Cows and Cool Sequences

dp, math, number theory

Eleventh Birthday

combinatorics, dp, math

Tree Quiz

PE Lesson

dp, math

Fibonacci String Subsequences

combinatorics, dp, matrices

Sereja and Tree

graphs, implementation

Privatization of Roads in Berland

flows, graph matchings, graphs

Cube Problem

brute force, math, number theory

Renovation

constructive algorithms, greedy, sortings

Project Manager

brute force, data structures, implementation

Mausoleum

dp

Startup Funding

binary search, constructive algorithms, data structures, probabilities, two pointers

Two permutations

data structures

Four Divisors

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

Buses and People

binary search, data structures, sortings

Fire in the City

binary search, data structures

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Minegraphed

constructive algorithms, graphs

Kuro and Topological Parity

dp

Refactoring

greedy, implementation, strings

Students Initiation

binary search, flows, graphs

Divisibility

constructive algorithms, dp, greedy, number theory

Geometrical Progression

brute force, math, number theory

Sereja and Sets

bitmasks, dfs and similar

Underfail

flows

Exam Cheating

binary search, dp

Finals in arithmetic

constructive algorithms, implementation, math

Inversions problem

dp, probabilities

Forming Groups

Greg and Caves

combinatorics, dp

Abracadabra

divide and conquer

Magical Permutation

bitmasks, brute force, constructive algorithms, data structures, graphs, math

Lihmuf Balling

binary search, brute force, math

Michael and Charging Stations

binary search, dp, greedy