No to Palindromes!

greedy, strings

Appleman and Card Game

greedy

Present

binary search, data structures, greedy

Little Dima and Equation

brute force, implementation, math, number theory

Pashmak and Flowers

combinatorics, implementation, sortings

Golden System

math, meet-in-the-middle

Boredom

dp

Little Pony and Expected Maximum

probabilities

Predict Outcome of the Game

brute force, implementation, math

Sort the Array

implementation, sortings

Jzzhu and Sequences

implementation, math

Jzzhu and Chocolate

greedy, math

Suffix Structures

implementation, strings

DZY Loves Sequences

dp, implementation, two pointers

DZY Loves Chemistry

dfs and similar, dsu, greedy

DZY Loves Physics

greedy, math

Kolya and Tandem Repeat

brute force, implementation, strings

Borya and Hanabi

bitmasks, brute force, implementation

Valera and Tubes

constructive algorithms, dfs and similar, implementation

Valera and Fruits

greedy, implementation

Balancer

greedy, implementation

Devu and his Brother

binary search, sortings, ternary search, two pointers

Devu and Partitioning of the Array

brute force, constructive algorithms, implementation, number theory

The Child and Toy

graphs, greedy, sortings

The Child and Set

bitmasks, greedy, implementation, sortings

The Child and Homework

implementation

Om Nom and Spiders

implementation, math

Feed with Candy

greedy

Cardiogram

implementation

Pasha Maximizes

greedy

k-Tree

dp, implementation, trees

Balls Game

brute force, two pointers

Points and Segments (easy)

constructive algorithms, sortings

Working out

dp

Xor-tree

dfs and similar, trees

Checkposts

dfs and similar, graphs, two pointers

Sereja and Mirroring

implementation

Sereja and Swaps

brute force, sortings

Magic Formulas

math

Football

constructive algorithms, graphs, implementation

Crash

implementation

Elimination

dp, implementation, math

Booking System

binary search, dp, greedy, implementation

Art Union

brute force, dp, implementation

Guess a number!

greedy, implementation, two pointers

Mashmokh and Tokens

binary search, greedy, implementation, math

Mashmokh and ACM

combinatorics, dp, number theory

Mashmokh and Numbers

constructive algorithms, number theory

Jeopardy!

greedy, math

Spyke Chatting

implementation

Kicker

*special problem, implementation

Multi-core Processor

implementation

A + B Strikes Back

*special problem, brute force, constructive algorithms, dsu, implementation

Big Data

*special problem

Magnum Opus

*special problem

Mysterious Language

*special problem

The Great Game

*special problem

Long Path

dp, implementation

Triangle

brute force, geometry, implementation, math

Toy Sum

greedy, implementation, math

Unusual Product

implementation, math

Marathon

implementation, math

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

Semifinals

implementation, sortings

Maze

dfs and similar

I.O.U.

implementation

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

Hamburgers

binary search, brute force

Fox Dividing Cheese

math, number theory

Berland Bingo

implementation

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

Fixing Typos

greedy, implementation

Two Semiknights Meet

greedy, math

Levko and Array Recovery

greedy, implementation

Permutation

constructive algorithms, dp, math

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