Strange Calculation and Cats

dp, matrices

Happy Tree Party

data structures, dfs and similar, graphs, math, trees

Beautiful Function

constructive algorithms, math

Anton and Lines

geometry, sortings

2Char

brute force, implementation

BCPC

binary search, geometry, two pointers

Super M

dfs and similar, dp, graphs, trees

The Big Race

math

The Monster and the Squirrel

math

PawnChess

implementation

Rebranding

implementation, strings

Wizards' Duel

implementation, math

Birthday

graph matchings, strings

Top Secret Task

dp

Three States

dfs and similar, graphs, shortest paths

Chip 'n Dale Rescue Rangers

binary search, geometry, math

Median Smoothing

implementation

Duff in Love

math

Duff and Meat

greedy

Duff is Mad

data structures, strings

Duff as a Queen

data structures

Duff in Mafia

2-sat, binary search

Duff in the Army

data structures, trees

Duff in Beach

dp

Duff and Weight Lifting

greedy

Laurenty and Shop

implementation

Alena's Schedule

implementation

Digits of Number Pi

dp, implementation, strings

Present for Vitalik the Philatelist

combinatorics, math, number theory

Lizard Era: Beginning

meet-in-the-middle

Alice, Bob, Oranges and Apples

number theory

Phillip and Trains

dfs and similar, graphs, shortest paths

Gennady the Dentist

brute force, implementation

Anton and Ira

constructive algorithms, greedy, math

Dima and Lisa

brute force, math, number theory

Marina and Vasya

constructive algorithms, greedy, strings

Kolya and Tanya

combinatorics

Olesya and Rodion

math

Robot's Task

greedy, implementation

Asphalting Roads

implementation

Boolean Function

bitmasks, dp, expression parsing

Number of Binominal Coefficients

dp, math, number theory

Superior Periodic Subarrays

number theory

Once Again...

constructive algorithms, dp, matrices

GCD Table

constructive algorithms, greedy, number theory

Zublicanes and Mumocrates

dp, trees, two pointers

Kojiro and Furrari

dp, greedy

Three Logos

bitmasks, brute force, constructive algorithms, geometry, implementation, math

Developing Skills

implementation, math, sortings

Luxurious Houses

implementation, math

Vasya the Hipster

implementation, math

Kefa and Watch

data structures, hashing, strings

Kefa and Dishes

bitmasks, dp

Kefa and Park

dfs and similar, graphs, trees

Kefa and Company

binary search, sortings, two pointers

Kefa and First Steps

brute force, dp, implementation

Finding Team Member

brute force, implementation, sortings

Raising Bacteria

bitmasks

Mirror Box

matrices, trees

Walking!

constructive algorithms, greedy

LCS Again

dp, greedy

Weakness and Poorness

ternary search

"Or" Game

brute force, greedy

A Problem about Polyline

geometry, math

Modulo Sum

combinatorics, data structures, dp, two pointers

Multiplication Table

implementation, number theory

Painting Edges

binary search, data structures

Flights for Regular Customers

dp, matrices

Points on Plane

constructive algorithms, divide and conquer, geometry, greedy, sortings

Invariance of Tree

constructive algorithms, dfs and similar, greedy, trees

Vasya and Petya's Game

math, number theory

Robots protection

data structures

Bots

combinatorics, dp, math, number theory

Run for beer

dfs and similar, shortest paths

Bulbo

dp, greedy

Spectator Riots

geometry

Tablecity

constructive algorithms, implementation

Party

bitmasks, brute force, graph matchings

Bribes

dfs and similar, graphs, trees

Fibonotci

data structures, math, matrices

Bear and Three Musketeers

brute force, dfs and similar, graphs, hashing

Bear and Elections

greedy, implementation

Bear and Bowling

data structures, greedy

Bear and Cavalry

data structures, divide and conquer, dp

Bear and Drawing

constructive algorithms, dfs and similar, trees

Bear and Blocks

binary search, data structures, dp, math

Bear and Poker

implementation, math, number theory

Order Book

data structures, greedy, implementation, sortings

Arrays

sortings

Geometric Progressions

math

Campus

binary search, data structures, dsu, trees

CNF 2

constructive algorithms, dfs and similar, graphs, greedy

Minimization

dp, greedy, sortings

Lengthening Sticks

combinatorics, implementation, math

Pig and Palindromes

combinatorics, dp

Tree Requests

binary search, bitmasks, constructive algorithms, dfs and similar, graphs, trees

Replacement

constructive algorithms, data structures, implementation

Simple Game

constructive algorithms, games, greedy, implementation, math

Elections

implementation

Inventory

greedy, math