Points in triangle

*special problem, geometry

Levenshtein distance

*special problem

Jumping frogs

*special problem

Group Photo 2 (online mirror version)

brute force, greedy, sortings

Om Nom and Candies

brute force, greedy, math

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

Social Network

greedy, two pointers

The Art of Dealing with ATM

binary search, sortings

Closest Equals

*special problem, data structures

Chicken or Fish?

greedy

Cubes

games, greedy, implementation

A and B and Lecture Rooms

binary search, data structures, dfs and similar, dp, trees

Drazil and Tiles

constructive algorithms, greedy

R2D2 and Droid Army

binary search, data structures, two pointers

Watto and Mechanism

binary search, data structures, hashing, string suffix structures, strings

Second price auction

bitmasks, probabilities

Fox And Jumping

bitmasks, brute force, dp, math

Pretty Song

math, strings

Sums of Digits

dp, greedy, implementation

Breaking Good

dfs and similar, dp, graphs, shortest paths

Mr. Kitayuta, the Treasure Hunter

dfs and similar, dp, two pointers

Misha and Permutations Summation

data structures

New Year Santa Network

combinatorics, dfs and similar, graphs, trees

Array and Operations

flows, graph matchings, number theory

Distributing Parts

greedy, sortings

Tennis Game

binary search

Obsessive String

dp, strings

Vanya and Field

math

New York Hotel

greedy, math

Restoring Increasing Sequence

binary search, brute force, greedy, implementation

Chocolate

brute force, dfs and similar, math, meet-in-the-middle, number theory

Special Matrices

combinatorics, dp

Candy Boxes

brute force, constructive algorithms, math

Strip

binary search, data structures, dp, two pointers

Valid Sets

dfs and similar, dp, math, trees

Maximum Value

binary search, math, sortings, two pointers

Riding in a Lift

combinatorics, dp

Red-Green Towers

dp

Dreamoon and Sets

constructive algorithms, greedy, math

CGCDSSQ

brute force, data structures, math

Kamal-ol-molk's Painting

brute force, constructive algorithms, greedy

Ant colony

data structures, math, number theory

Pillars

binary search, data structures, dp, sortings, trees

Captain Marmot

brute force, geometry

Design Tutorial: Inverse the Problem

dfs and similar, dsu, shortest paths, trees

Chessboard

*special problem

Caesar Cipher

*special problem

Eval

*special problem

Two Sets

2-sat, dfs and similar, dsu, graph matchings, greedy

Information Graph

dfs and similar, dsu, graphs, trees

Increase Sequence

combinatorics, dp

Wonder Room

brute force, math

Substitutes in Number

dp

Restore Cube

brute force, geometry

Caisa and Tree

brute force, dfs and similar, math, number theory, trees

Gargari and Permutations

dfs and similar, dp, graphs, implementation

Gargari and Bishops

greedy, hashing, implementation

Appleman and Tree

dfs and similar, dp, trees

Pashmak and Graph

dp, sortings

Pashmak and Buses

combinatorics, constructive algorithms, math

Elections

brute force

Distributed Join

greedy

Civilization

dfs and similar, dp, dsu, ternary search, trees

A Lot of Games

dfs and similar, dp, games, implementation, strings, trees

Little Pony and Harmony Chest

bitmasks, brute force, dp

Washer, Dryer, Folder

greedy, implementation

Magic Trick

combinatorics, math, probabilities

Count Good Substrings

math

Jzzhu and Cities

graphs, greedy, shortest paths

Painting Fence

divide and conquer, dp, greedy

DZY Loves Modification

brute force, data structures, greedy

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Devu and Birthday Celebration

combinatorics, dp, math

The Child and Zoo

dsu, sortings

Special Grid

brute force, dp, greedy

Nanami's Digital Board

dsu, implementation

Prefixes and Suffixes

dp, string suffix structures, strings, two pointers

Random Task

binary search, bitmasks, combinatorics, dp, math

Police Patrol

greedy, implementation, math, ternary search

Bug in Code

binary search, data structures, sortings

Bug in Code

data structures, graphs, implementation, two pointers

Cunning Gena

bitmasks, dp, greedy, sortings

Mashmokh and Reverse Operation

combinatorics, divide and conquer

2048

bitmasks, dp

E-mail Addresses

implementation

Giving Awards

dfs and similar

000001

*special problem

Minesweeper 1D

dp, implementation

Roman and Numbers

bitmasks, brute force, combinatorics, dp, number theory

Inna and Binary Logic

binary search, bitmasks, data structures

Dima and Bacteria

dsu, graphs, shortest paths

Fox and Card Game

games, greedy, sortings

Fox and Minimal path

bitmasks, constructive algorithms, graphs, implementation, math

Game with Points

dp, graphs, implementation, shortest paths

Diverse Substrings

dp, strings, two pointers

Propagating tree

data structures, dfs and similar, trees

Number Busters

binary search, math

Sereja and Brackets

data structures, schedules

New Year Letter

bitmasks, brute force, dp

Preparing for the Contest

binary search, data structures, greedy, sortings