Four Divisors

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

To Hack or not to Hack

brute force, dp, greedy

Binary Table

bitmasks, brute force, divide and conquer, dp, fft, math

Fence Divercity

combinatorics, dp, number theory

Zip-line

binary search, data structures, dp, hashing

Table Compression

dfs and similar, dp, dsu, graphs, greedy

Intellectual Inquiry

dp, greedy, strings

Bears and Juice

dp, math, meet-in-the-middle

Bear and Destroying Subtrees

dp, math, probabilities, trees

Levels and Regions

dp

Little Artem and Random Variable

dp, implementation, math, probabilities

The Chocolate Spree

dfs and similar, dp, graphs, trees

Thief in a Shop

divide and conquer, dp, fft, math

Product Sum

data structures, dp, geometry

Famil Door and Roads

combinatorics, data structures, dfs and similar, dp, probabilities, trees

Magic Numbers

dp

Preorder Test

binary search, dfs and similar, dp, graphs, greedy, trees

Raffles

data structures, dp, greedy, math

Group Projects

dp

Transforming Sequence

combinatorics, dp, fft, math

Electric Charges

binary search, dp

Array GCD

dp, greedy, number theory

Combining Slimes

dp, math, matrices, probabilities

Hamiltonian Spanning Tree

dfs and similar, dp, graph matchings, greedy, trees

Puzzle Lover

dp, hashing, strings

Kingdom and its Cities

dfs and similar, divide and conquer, dp, graphs, sortings, trees

Simba on the Circle

dp

A Museum Robbery

data structures, dp

Kleofáš and the n-thlon

dp, math, probabilities

Sandy and Nuts

bitmasks, dp, trees

Wilbur and Strings

dfs and similar, dp, graphs, strings

Wilbur and Trees

dp, math, probabilities, sortings

Strange Calculation and Cats

dp, matrices

Super M

dfs and similar, dp, graphs, trees

Top Secret Task

dp

Digits of Number Pi

dp, implementation, strings

Boolean Function

bitmasks, dp, expression parsing

Number of Binominal Coefficients

dp, math, number theory

Zublicanes and Mumocrates

dp, trees, two pointers

Kojiro and Furrari

dp, greedy

LCS Again

dp, greedy

Flights for Regular Customers

dp, matrices

Bear and Cavalry

data structures, divide and conquer, dp

Pig and Palindromes

combinatorics, dp

Longest Increasing Subsequence

data structures, dp

Mausoleum

dp

Gerald and Path

dp, sortings

Gerald and Giant Chess

combinatorics, dp, math, number theory

Ann and Half-Palindrome

data structures, dp, graphs, string suffix structures, strings, trees

Kyoya and Train

dp, fft, graphs, math, probabilities

Mike and Foam

bitmasks, combinatorics, dp, math, number theory

Road Improvement

dp, trees

Remembering Strings

bitmasks, dp

Superhero's Job

dfs and similar, dp, hashing, math, number theory

Demiurges Play Again

dfs and similar, dp, math, trees

Tavas in Kansas

dp, games

Simplified Nonogram

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

Landmarks

data structures, dp

Transmitting Levels

dp, implementation

Pluses everywhere

combinatorics, dp, math, number theory

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Drazil and Morning Exercise

dfs and similar, dp, dsu, trees, two pointers

Darth Vader and Tree

dp, matrices

Inversions problem

dp

Inversions problem

dp, probabilities

Subarray Cuts

dp

Subarray Cuts

dp

Fox And Travelling

dp, trees

Progress Monitoring

dp, trees

Arthur and Brackets

dp, greedy

The Maths Lecture

dp, implementation

Mr. Kitayuta's Gift

combinatorics, dp, matrices, strings

New Year Shopping

divide and conquer, dp

New Year Domino

data structures, dp, dsu

Stairs and Lines

dp, matrices

Traffic Jams in the Land

data structures, dp, number theory

Name That Tune

dp, probabilities, two pointers

Subsequences Return

dp, matrices

Birthday

data structures, dfs and similar, dp, trees

Helping People

dp, probabilities

Treeland Tour

data structures, dfs and similar, dp, trees

Hiking

binary search, dp

LIS of Sequence

data structures, dp, greedy, hashing, math

Kindergarten

data structures, dp, greedy

Random Function and Tree

combinatorics, dp, trees

Game with Strings

bitmasks, dp, probabilities

Parcels

dp, graphs

Dreamoon and Binary

dp, strings

Dreamoon and Strings

dp, strings

Permanent

dp, graph matchings, math, meet-in-the-middle

Alex and Complicated Task

data structures, dp, greedy

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

World of Darkraft - 2

dp, probabilities

An easy problem about trees

dp, games, greedy, trees

Little Pony and Elements of Harmony

dp, matrices

Jzzhu and Squares

dp, math, number theory

Jzzhu and Numbers

bitmasks, combinatorics, dp

Valera and Number

bitmasks, dp, math, probabilities

Berland Federalization

dp, trees

The Child and Polygon

dp, geometry