Game with Cards

binary search, constructive algorithms, data structures, dp, greedy, implementation

Reading Books (hard version)

data structures, greedy, implementation, sortings, ternary search, two pointers

Points

combinatorics, data structures, implementation, math, matrices

Coloring

combinatorics, constructive algorithms, implementation, math

Case of a Top Secret

binary search, implementation, math

Tree Queries

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

XOR, Tree, and Queries

bitmasks, constructive algorithms, dfs and similar, dsu, graphs, greedy, implementation, trees

Brukhovich and Exams

brute force, greedy, implementation, math, sortings

Caterpillar on a Tree

dfs and similar, graphs, greedy, implementation, sortings, trees

Serval and Music Game

brute force, dp, implementation, math, number theory

Misha and Palindrome Degree

binary search, combinatorics, implementation

Map

data structures, implementation, sortings

Traveling in Berland

binary search, data structures, graphs, greedy, implementation

Degree Set

constructive algorithms, graphs, implementation

Hossam and a Letter

brute force, dp, implementation, two pointers

Volcanoes

binary search, implementation, sortings, two pointers

Inverse Transformation

constructive algorithms, implementation, math

Cook and Porridge

binary search, constructive algorithms, data structures, implementation

Vus the Cossack and a Field

divide and conquer, implementation, math

Madoka and The First Session

constructive algorithms, flows, graph matchings, graphs, implementation

Double Elimination

dp, implementation

Plane Tiling

geometry, implementation, math

New Year and Cleaning

binary search, implementation

Interactive Factorial Guessing

brute force, games, implementation, interactive

Strange Radiation

binary search, implementation, math

One Node is Gone

constructive algorithms, implementation, trees

Azembler

brute force, implementation

Keen Tree Calculation

binary search, data structures, dp, geometry, graphs, implementation, trees

Game with Tokens

data structures, games, implementation

Digits

brute force, implementation, math

Shooting Gallery

data structures, implementation

Shaass and Painter Robot

brute force, implementation, number theory

Cycle

brute force, dfs and similar, implementation

Lucky Segments

binary search, implementation, two pointers

Deputies

constructive algorithms, graphs, greedy, implementation

Two Circles

brute force, data structures, implementation

Combostone

games, implementation

Graph and Queries

data structures, dsu, graphs, implementation, trees

Greedy Shopping

binary search, data structures, divide and conquer, greedy, implementation

Rebrending

brute force, data structures, divide and conquer, implementation

Super Jaber

dfs and similar, graphs, implementation, shortest paths

Points Movement

data structures, dp, greedy, implementation, sortings

Lamps on a Circle

games, implementation, interactive, math

Survival of the Weakest (easy version)

binary search, brute force, implementation, math, sortings

Playoff Restoration

bitmasks, brute force, hashing, implementation, meet-in-the-middle

Counting Prefixes

combinatorics, constructive algorithms, dp, implementation, math

Number Challenge

combinatorics, dp, implementation, math, number theory

Vika and Stone Skipping

brute force, implementation, math, number theory

Intriguing Selection

brute force, constructive algorithms, implementation, interactive, sortings

Timofey and remoduling

brute force, implementation, math, number theory

Defining Macros

dp, expression parsing, implementation

Bracket Xoring

constructive algorithms, greedy, implementation, math

Strange Sorting

implementation, math

Two Paths

constructive algorithms, dsu, graphs, implementation

Kay and Eternity

brute force, implementation, sortings

Tricky Interactor

constructive algorithms, implementation, interactive

Dasha and Photos

brute force, data structures, dp, implementation

Encoded message

*special problem, implementation

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Fibonacci Additions

brute force, data structures, hashing, implementation, math

PermuTree (hard version)

bitmasks, dfs and similar, dp, fft, greedy, implementation, math, trees

Tree Generator™

data structures, implementation, trees

Christmas Chocolates

dfs and similar, dp, games, graphs, implementation, math, number theory, shortest paths, trees

Misha and Paintings

constructive algorithms, data structures, greedy, implementation, math

Minlexes

dp, greedy, implementation, strings

One-Four Overload

2-sat, constructive algorithms, dfs and similar, dsu, graphs, implementation

Swedish Heroes

brute force, dp, implementation

Toy Machine

constructive algorithms, games, implementation

Magician and Pigs (Hard Version)

binary search, brute force, data structures, implementation

Nene vs. Monsters (Hard Version)

brute force, greedy, implementation, math

Not Splitting

geometry, graphs, greedy, implementation, shortest paths

Colored Cubes

constructive algorithms, implementation, matrices

Farmer John's Favorite Function

brute force, data structures, implementation, math

Strange Instructions

data structures, greedy, implementation

Serval and Brain Power

bitmasks, brute force, dp, greedy, implementation, strings

Information Reform

dp, implementation, trees

Tasty Cookie

binary search, constructive algorithms, greedy, implementation

Once in a casino

constructive algorithms, greedy, implementation, math

You Are Given Some Letters...

binary search, implementation, math

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Pairs

dfs and similar, dp, dsu, graphs, implementation, trees

Concise and clear

brute force, greedy, implementation, math

October 18, 2017

combinatorics, dp, implementation, math

Robot in Basement

bitmasks, brute force, implementation

Entertaining Geodetics

brute force, dsu, implementation

Optimizer

graphs, greedy, hashing, implementation

Sleeping

combinatorics, implementation, math

Vasily the Bear and Painting Square

bitmasks, combinatorics, dp, implementation

k-Maximum Subsequence Sum

data structures, flows, graphs, implementation

Little Elephant and Strings

data structures, implementation, string suffix structures, two pointers

Serious Business

data structures, divide and conquer, dp, implementation, shortest paths

Equal Reversal

constructive algorithms, graphs, implementation, math

Too Many Constraints

2-sat, constructive algorithms, graphs, implementation

Number of Components

dsu, implementation

Raging Thunder

data structures, divide and conquer, implementation

Rain of Fire

binary search, data structures, dfs and similar, dsu, graphs, implementation

Cyclic Cipher

chinese remainder theorem, data structures, implementation, number theory, two pointers

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees

The Cells on the Paper

binary search, implementation, sortings

Sherlock's bet to Moriarty

constructive algorithms, data structures, divide and conquer, geometry, graphs, implementation, trees