Chess Rush

*special problem, combinatorics, dp, implementation, math

Cipher

implementation

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

INI-file

*special problem, implementation

Combostone

games, implementation

Harry Potter and Moving Staircases

dfs and similar, implementation

Red Blue Tree

data structures, implementation, trees

Multithreading (Hard Version)

combinatorics, implementation, math

Battleship

*special problem, dfs and similar, implementation

Balance the Cards

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

Grid Sort

implementation

Help King

implementation, probabilities, trees

Johnny and New Toy

data structures, implementation, math

Deja Vu

constructive algorithms, graphs, implementation

Name the album

*special problem, data structures, implementation

Optimizer

graphs, greedy, hashing, implementation

Vasily the Bear and Painting Square

bitmasks, combinatorics, dp, implementation

JS Minification

greedy, implementation

Sleeping

combinatorics, implementation, math

Inverse Function

implementation

Tree and Table

dfs and similar, dp, implementation, trees

Swiper, no swiping!

graphs, implementation

Passports

dp, implementation

Intranet of Buses

binary search, geometry, implementation, two pointers

kotlinkotlinkotlinkotlin...

*special problem, graphs, implementation, strings

Movie Fan

*special problem, data structures, greedy, implementation, sortings

Design Tutorial: Learn from a Game

constructive algorithms, implementation

Fedya the Potter

binary search, implementation, math, number theory

Entertaining Geodetics

brute force, dsu, implementation

Polynom

*special problem, implementation

Sequence Transformation

data structures, dp, implementation, math

Showing Off

flows, graph matchings, greedy, implementation

Escaping on Beaveractor

data structures, implementation, trees

The Fair Nut's getting crazy

data structures, implementation

Strange Permutation

binary search, combinatorics, data structures, dp, graphs, implementation, two pointers

Harry The Potter

brute force, constructive algorithms, dp, fft, implementation, math

Two Rooted Trees

data structures, implementation, trees

Perpetual Motion Machine

constructive algorithms, dp, graphs, implementation, math, trees

Suns and Rays

constructive algorithms, dfs and similar, implementation

Qingshan and Daniel

brute force, data structures, greedy, implementation

Suns and Rays

dfs and similar, implementation

Escaping on Beaveractor

dfs and similar, implementation

Twilight and Ancient Scroll (harder version)

dp, hashing, implementation, string suffix structures, strings, two pointers

Shooting Gallery

data structures, implementation

Inna and Babies

binary search, data structures, dsu, geometry, implementation

Robot in Basement

bitmasks, brute force, implementation

Two Circles

brute force, data structures, implementation

Array Sorting

*special problem, implementation

Tape Programming

data structures, implementation

Karen and Neighborhood

binary search, constructive algorithms, implementation

Game with Cards

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

Hamming Triples

implementation, math, two pointers

String Distance

binary search, brute force, data structures, hashing, implementation, strings

Encoded message

*special problem, implementation

Tree or not Tree

data structures, divide and conquer, implementation, trees

Anagram Paths

dp, implementation, trees

Sasha and a Patient Friend

binary search, data structures, implementation

A polyline

*special problem, implementation

Berland Square

implementation, math

Get Ready for the Battle

constructive algorithms, implementation

Lucky Pair

combinatorics, data structures, implementation

Stack

*special problem, expression parsing, implementation

Mirror Room

data structures, implementation

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Reverse It!

*special problem, implementation

Deputies

constructive algorithms, graphs, greedy, implementation

Polo the Penguin and Lucky Numbers

dp, implementation, math

Greedy Elevator

data structures, implementation

Domino

brute force, implementation

Pairs

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

Inquisition

geometry, implementation, sortings

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Lucky Segments

binary search, implementation, two pointers

Item World

brute force, implementation, sortings

Friendly Numbers

*special problem, implementation

Johnny and James

greedy, implementation, math, trees

Bowls

geometry, implementation

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Concise and clear

brute force, greedy, implementation, math

Delete The Edges

brute force, constructive algorithms, dfs and similar, graphs, implementation

Binary Notation

*special problem, implementation

You Are Given Some Letters...

binary search, implementation, math

Race

brute force, implementation

Binary Key

dp, greedy, implementation

Domino Carpet

dp, implementation

Battlefield

geometry, graphs, implementation, shortest paths

Physical Education and Buns

brute force, implementation, math

Bear and Chase

brute force, dfs and similar, graphs, implementation, math, probabilities

Hide-and-Seek

geometry, implementation

Shaass and Painter Robot

brute force, implementation, number theory

Tractor College

implementation, math, number theory, ternary search

HQ9+

*special problem, implementation

Cycle

brute force, dfs and similar, implementation

Table

*special problem, greedy, implementation, math

Digits

brute force, implementation, math

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Goofy Numbers

*special problem, implementation

Red and Black Tree

dp, implementation, math

Race

brute force, implementation, two pointers

Two Paths

constructive algorithms, dsu, graphs, implementation