Marathon

implementation, math

Upgrading Array

dp, greedy, math, number theory

Searching for Graph

brute force, constructive algorithms, graphs

Trees in a Row

brute force, implementation

Team

constructive algorithms, greedy, implementation

Inna and Huge Candy Matrix

implementation, math

Fox and Box Accumulation

greedy, sortings

George and Number

greedy, implementation

Fly, freebies, fly!

binary search, brute force, implementation

Bear and Prime Numbers

binary search, brute force, data structures, dp, implementation, math, number theory

Multitasking

greedy, implementation, sortings, two pointers

Milking cows

data structures, greedy

Arithmetic Progression

implementation, sortings

Sereja and Prefixes

binary search, brute force

New Year Ratings Change

greedy, sortings

Maze

dfs and similar

Maximum Submatrix 2

data structures, dp, implementation, sortings

Divisible by Seven

math, number theory

Inna and Nine

combinatorics, greedy

Making Sequences is Fun

binary search, implementation, math

Counting Kangaroos is Fun

binary search, greedy, sortings, two pointers

Vessels

data structures, dsu, implementation, trees

Hamburgers

binary search, brute force

Mittens

constructive algorithms, greedy, sortings

Valera and Elections

dfs and similar, graphs, trees

Valera and Contest

constructive algorithms, implementation, math

Sereja and Algorithm

data structures, implementation

Matrix

combinatorics, data structures, implementation

Renting Bikes

binary search, greedy

Fixing Typos

greedy, implementation

Two Semiknights Meet

greedy, math

Levko and Array Recovery

greedy, implementation

Permutation

constructive algorithms, dp, math

Dima and Hares

dp, greedy

Dima and Text Messages

brute force, strings

Dima and Continuous Line

brute force, implementation

Flag Day

constructive algorithms, implementation

Knight Tournament

data structures, dsu

Vasya and Robot

brute force, greedy, math

Find Maximum

implementation, math, number theory

Jeff and Rounding

dp, greedy, implementation, math

Bombs

greedy, implementation, sortings

Resort

graphs

Color the Fence

data structures, dp, greedy, implementation

Mafia

binary search, math, sortings

Alice and Bob

games, math, number theory

Expecting Trouble

*special problem, probabilities

Alternating Current

data structures, greedy, implementation

Rational Resistance

math, number theory

Xenia and Spies

brute force, greedy, implementation

Bubble Sort Graph

binary search, data structures, dp

Tourist Problem

combinatorics, implementation, math

Xenia and Bit Operations

data structures, trees

Xenia and Weights

constructive algorithms, dfs and similar, dp, graphs, greedy, shortest paths

Quiz

binary search, greedy, math, matrices, number theory

Routine Problem

greedy, math, number theory

Vasily the Bear and Sequence

brute force, greedy, implementation, number theory

Banana

binary search, constructive algorithms, greedy

Eight Point Sets

sortings

Chips

greedy

Secrets

greedy

Maximum Absurdity

data structures, dp, implementation

Shave Beaver!

implementation

Oh Sweet Beaverette

data structures, sortings

Oh Sweet Beaverette

brute force, implementation

Biridian Forest

dfs and similar, shortest paths

Purification

constructive algorithms, greedy

Sheldon and Ice Pieces

greedy

IQ Test

implementation

Magic Five

combinatorics, math

Stadium and Games

binary search, math

Square and Rectangles

implementation

Black-and-White Cube

combinatorics, constructive algorithms

Ciel and Flowers

combinatorics, math

Ciel and Robot

binary search, implementation, math

Ping-Pong (Easy Version)

dfs and similar, graphs

Malek Dance Club

combinatorics, math

Perfect Pair

brute force

Good Substrings

hashing, strings

Summer Homework

brute force, data structures

EKG

dfs and similar, dp

EKG

brute force, dfs and similar

Special Task

math

Sereja and Bottles

brute force

Sereja and Contest

implementation

Ilya and Matrix

constructive algorithms, greedy, implementation, sortings

Ivan and Powers of Two

greedy, implementation

Continued Fractions

brute force, implementation, math

Strange Addition

brute force, constructive algorithms, implementation

Rectangle Puzzle II

implementation, math

Yaroslav and Sequence

constructive algorithms

Beautiful Numbers

brute force, combinatorics

Coach

brute force, dfs and similar, graphs

Fish Weight

constructive algorithms, greedy

Parity Game

constructive algorithms

Greg and Graph

dp, graphs, shortest paths

Greg and Array

data structures, implementation

Shaass and Bookshelf

dp, greedy

Weird Game

games, greedy

Parallel Programming

*special problem, greedy