Selling Numbers

dp, sortings

Parquet Re-laying

constructive algorithms

Peterson Polyglot

brute force, dfs and similar, dsu, hashing, strings, trees

Bitwise Formula

bitmasks, brute force, dfs and similar, expression parsing, implementation

String Game

binary search, greedy, strings

Hanoi Factory

brute force, data structures, dp, greedy, sortings

Cloud of Hashtags

binary search, greedy, implementation, strings

Alyona and Spreadsheet

binary search, data structures, dp, greedy, implementation, two pointers

Game of Credit Cards

data structures, dp, greedy, sortings

Shell Game

constructive algorithms, implementation, math

Sherlock and the Encrypted Data

bitmasks, combinatorics, dp

Sherlock's bet to Moriarty

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

The Holmes Children

math, number theory

The Door Problem

2-sat, dfs and similar, dsu, graphs

Molly's Chemicals

binary search, brute force, data structures, implementation, math

Sherlock and his girlfriend

constructive algorithms, number theory

A Serial Killer

brute force, implementation, strings

University Schedule

*special problem

Bars

*special problem, binary search

Stepan and Vowels

*special problem, implementation, strings

Stepan's Series

*special problem, dp

Composing Of String

*special problem, dp

Repairing Of String

*special problem, constructive algorithms

Perfectionist Arkadiy

*special problem, number theory

Pens And Days Of Week

*special problem, binary search, number theory

Big Number and Remainder

*special problem, math, number theory

Lie or Truth

*special problem, constructive algorithms, implementation, sortings

Maximum Number

*special problem, constructive algorithms, greedy, implementation

Significant Cups

*special problem, binary search, data structures, two pointers

Amusement Park

*special problem, ternary search

Test Data Generation

combinatorics, divide and conquer, dp, fft, math, number theory

Blog Post Rating

data structures, sortings

Perishable Roads

dp, graphs, shortest paths

Prairie Partition

binary search, constructive algorithms, greedy, math

Dynamic Problem Scoring

brute force, greedy

Success Rate

binary search, math

Verifying Kingdom

binary search, divide and conquer, interactive, trees

Varying Kibibits

bitmasks, dp

Vulnerable Kerbals

constructive algorithms, dp, graphs, math, number theory

Volatile Kite

geometry

Voltage Keepsake

binary search, math

Bear and Isomorphic Points

geometry, two pointers

Bear and Rectangle Strips

dp, greedy

Bear and Company

dp

Bear and Tree Jumps

dfs and similar, dp, trees

Bear and Different Names

constructive algorithms, greedy

Bear and Friendship Condition

dfs and similar, dsu, graphs

Draw Brackets!

*special problem, implementation

Online Courses In BSU

*special problem, dfs and similar, graphs, implementation

Maximize Sum of Digits

*special problem, implementation, math

New Password

*special problem, implementation

k-Interesting Pairs Of Integers

*special problem, bitmasks, brute force, meet-in-the-middle

Cycle In Maze

*special problem, dfs and similar, graphs, greedy, shortest paths

News About Credit

*special problem, greedy, two pointers

Year of University Entrance

*special problem, implementation, sortings

The Winds of Winter

binary search, data structures

Barrels and boxes

brute force, combinatorics, math, number theory, probabilities

Game of Stones

bitmasks, dp, games

Jon and Orbs

dp, math, probabilities

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Code For 1

constructive algorithms, dfs and similar, divide and conquer

Oath of the Night's Watch

constructive algorithms, sortings

Change-free

greedy

Cartons of milk

binary search, data structures, greedy, sortings, two pointers

Garland

dfs and similar, graphs, greedy, trees

The Queue

brute force, greedy

Snacktower

data structures, implementation

Mahmoud and a xor trip

bitmasks, constructive algorithms, data structures, dfs and similar, dp, math, trees

Mahmoud and a Dictionary

data structures, dfs and similar, dp, dsu, graphs

Mahmoud and a Message

brute force, dp, greedy, strings

Mahmoud and a Triangle

constructive algorithms, geometry, greedy, math, number theory, sortings

Mahmoud and Longest Uncommon Subsequence

constructive algorithms, strings

Math, math everywhere

brute force, dp, math, meet-in-the-middle, number theory

Souvenirs

data structures

Tree Folding

dfs and similar, dp, greedy, implementation, trees

Artsem and Saunders

constructive algorithms, dsu, math

Table Tennis Game 2

math

Code obfuscation

greedy, implementation, strings

Neverending competitions

implementation, math

Timofey and cubes

constructive algorithms, implementation

Taymyr is calling you

brute force, implementation, math

Timofey and our friends animals

data structures, divide and conquer, dsu

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Timofey and remoduling

brute force, implementation, math, number theory

Timofey and rectangles

constructive algorithms, geometry

Timofey and a tree

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

Tree nesting

combinatorics, graphs, trees

Radio stations

binary search, data structures

Maximum path

dp, greedy, implementation

Two strings

binary search, hashing, strings, two pointers

USB vs. PS/2

greedy, implementation, sortings, two pointers

k-th divisor

math, number theory

Dasha and Photos

brute force, data structures, dp, implementation

Dasha and Puzzle

constructive algorithms, dfs and similar, graphs, greedy, trees

Dasha and Very Difficult Problem

binary search, brute force, constructive algorithms, greedy, sortings

Dasha and Password

brute force, dp, implementation

Dasha and friends

brute force, implementation, math

Dasha and Stairs

brute force, constructive algorithms, implementation, math

Frodo and pillows

binary search, greedy

Petr and a calendar

implementation, math