Colorado Potato Beetle

dfs and similar, implementation

Gnikool Ssalg

*special problem, implementation, strings

Number of Components

dsu, implementation

Playing Around the Table

constructive algorithms, greedy, implementation

Widget Library

dp, expression parsing, graphs, implementation

Mirror Box

geometry, implementation

Two Paths

constructive algorithms, dsu, graphs, implementation

Tests Renumeration

greedy, implementation

HQ9+

*special problem, implementation

Plane Tiling

geometry, implementation, math

Double Elimination

dp, implementation

Cyclic Cipher

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

Sweets for Everyone!

binary search, greedy, implementation

Rain of Fire

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

Get Ready for the Battle

constructive algorithms, implementation

Information Reform

dp, implementation, trees

Vasya the Architect

implementation

New Year and Finding Roots

constructive algorithms, implementation, interactive, trees

Chips Puzzle

constructive algorithms, implementation, math

Kay and Eternity

brute force, implementation, sortings

Sweets

*special problem, data structures, implementation

Interactive Factorial Guessing

brute force, games, implementation, interactive

New Year and Cleaning

binary search, implementation

Geometrical problem

implementation

Black Widow

dp, graphs, implementation, math

Goofy Numbers

*special problem, implementation

Tricky Interactor

constructive algorithms, implementation, interactive

Game

games, implementation

String Distance

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

LCM

*special problem, implementation, math

Showing Off

flows, graph matchings, greedy, implementation

Strange Radiation

binary search, implementation, math

Touchy-Feely Palindromes

*special problem, implementation

Weighed Tree Radius

data structures, divide and conquer, implementation, trees

Tasty Cookie

binary search, constructive algorithms, greedy, implementation

Keen Tree Calculation

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

Andrey's Tree

binary search, constructive algorithms, data structures, dfs and similar, dsu, greedy, implementation, trees

Decoding of Integer Sequences

*special problem, data structures, implementation

One Node is Gone

constructive algorithms, implementation, trees

Game with Points

dp, graphs, implementation, shortest paths

Cartoons

*special problem, implementation, sortings

Azembler

brute force, implementation

Qingshan and Daniel

brute force, data structures, greedy, implementation

Once in a casino

constructive algorithms, greedy, implementation, math

Dasha and Photos

brute force, data structures, dp, implementation

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Red and Black Tree

dp, implementation, math

Game with Tokens

data structures, games, implementation

Shooting Gallery

data structures, implementation

Palindrome

implementation, strings

Dima and Kicks

brute force, dsu, graphs, implementation

Air Reform

data structures, dfs and similar, divide and conquer, dsu, graphs, implementation, trees

Race

brute force, implementation, two pointers

You Are Given Some Letters...

binary search, implementation, math

Red-Black Cobweb

data structures, divide and conquer, implementation, trees

Digits

brute force, implementation, math

Playing Quidditch (Easy)

implementation

Twilight and Ancient Scroll (easier version)

dp, hashing, implementation, string suffix structures, strings

Rhyme

*special problem, implementation

Twilight and Ancient Scroll (harder version)

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

Pasha and Pipe

binary search, brute force, combinatorics, dp, implementation

Shrink-Reverse

binary search, brute force, greedy, hashing, implementation, string suffix structures, strings

Amanda the Amoeba

graphs, implementation, trees, two pointers

Kingdom of Islands

brute force, graphs, implementation

Дефрагментация памяти

constructive algorithms, greedy, implementation

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

Anagram Paths

dp, implementation, trees

Tractor College

implementation, math, number theory, ternary search

Beautiful Tree

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

Four Vertices

constructive algorithms, data structures, graphs, greedy, implementation, shortest paths

Delete The Edges

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

Table

*special problem, greedy, implementation, math

Bowls

geometry, implementation

Array Sorting

*special problem, implementation

Item World

brute force, implementation, sortings

Pairs

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

Sagheer and Kindergarten

dfs and similar, graphs, implementation, trees

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

Sweepstake

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

Hide-and-Seek

geometry, implementation

Pepe Racing

constructive algorithms, implementation, interactive, sortings

Triangle Platinum?

brute force, combinatorics, implementation, interactive, math, probabilities

Tree or not Tree

data structures, divide and conquer, implementation, trees

Domino Carpet

dp, implementation

Playing Quidditch (Hard)

implementation

Bear and Chase

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

Johnny and James

greedy, implementation, math, trees

Shaass and Painter Robot

brute force, implementation, number theory

Playing Quidditch (Medium)

implementation

Mirror Room

data structures, implementation

Concise and clear

brute force, greedy, implementation, math

Binary Key

dp, greedy, implementation

Encoded message

*special problem, implementation

Strange Permutation

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

Binary Notation

*special problem, implementation

Cycle

brute force, dfs and similar, implementation

Polo the Penguin and Lucky Numbers

dp, implementation, math

Greedy Elevator

data structures, implementation