The Meaningless Game

math, number theory

Misha, Grisha and Underground

dfs and similar, graphs, trees

Petya and Exam

implementation, strings

Jury Marks

brute force, constructive algorithms

Cards Sorting

data structures, implementation, sortings

Office Keys

binary search, brute force, dp, greedy, sortings

Black Square

implementation

High Load

constructive algorithms, greedy, implementation, trees

String Reconstruction

data structures, greedy, sortings, strings

Suitable Replacement

binary search, greedy, implementation

Multi-judge Solving

greedy, implementation

Five-In-a-Row

brute force, implementation

My pretty girl Noora

brute force, dp, greedy, math, number theory

Hacker, pack your bags!

binary search, greedy, implementation, sortings

Okabe and Boxes

data structures, greedy, trees

Okabe and Banana Trees

brute force, math

Mister B and Angle in Polygon

constructive algorithms, geometry, math

Mister B and PR Shifts

data structures, implementation, math

Card Game Again

binary search, data structures, number theory, two pointers

Multicolored Cars

data structures, implementation

Permutation Game

implementation

Imbalanced Array

data structures, divide and conquer, dsu, sortings

Really Big Numbers

binary search, brute force, dp, math

Makes And The Product

combinatorics, implementation, math, sortings

Karen and Coffee

binary search, data structures, implementation

Karen and Game

brute force, greedy, implementation

An impassioned circulation of affection

brute force, dp, strings, two pointers

An express train to reveries

constructive algorithms

The Tag Game

dfs and similar, graphs

The Golden Age

brute force, math

Sagheer and Nubian Market

binary search, sortings

Sagheer, the Hausmeister

bitmasks, brute force, dp

Vladik and Memorable Trip

dp, implementation

Summer sell-off

greedy, sortings

Do you want a date?

implementation, math, sortings

Array Division

binary search, data structures, implementation

Tea Party

constructive algorithms, greedy, sortings

Average Sleep Time

data structures, implementation, math

T-Shirt Hunt

brute force, implementation

Minimum number of steps

combinatorics, greedy, implementation, math

Magazine Ad

binary search, greedy

Maximal GCD

constructive algorithms, greedy, math

Maximal Binary Matrix

constructive algorithms

Send the Fool Further! (easy)

dfs and similar, graphs, trees

Heidi and Library (medium)

data structures, greedy

Heidi and Library (easy)

greedy

Fountains

binary search, data structures, implementation

T-shirt buying

data structures, implementation

Mike and gcd problem

dp, greedy, number theory

Mike and strings

brute force, dp, strings

Minimal string

data structures, greedy, strings

Odd sum

dp, greedy, implementation

Bank Hacking

constructive algorithms, data structures, dp, trees

Find The Bone

implementation

Naming Company

games, greedy, sortings

Igor and his way to work

dfs and similar, graphs, implementation, shortest paths

Paths in a Complete Binary Tree

bitmasks, trees

Counting-out Rhyme

implementation

Masha and geometric depression

brute force, implementation, math

Functions again

dp, two pointers

Not Afraid

greedy, implementation, math

Anton and Fairy Tale

binary search, math

Crunching Numbers Just for You

*special problem, implementation

Touchy-Feely Palindromes

*special problem, implementation

INTERCALC

*special problem, implementation

Numbers Joke

*special problem

Innokenty and a Football League

2-sat, graphs, greedy, implementation, shortest paths, strings

Andryusha and Colored Balloons

dfs and similar, graphs, greedy, trees

The Meeting Place Cannot Be Changed

binary search

Bitwise Formula

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

String Game

binary search, greedy, strings

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

Molly's Chemicals

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

Stepan and Vowels

*special problem, implementation, strings

Lie or Truth

*special problem, constructive algorithms, implementation, sortings

Success Rate

binary search, math

Volatile Kite

geometry

Voltage Keepsake

binary search, math

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

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

Jon Snow and his Favourite Number

brute force, dp, implementation, sortings

Code For 1

constructive algorithms, dfs and similar, divide and conquer

Mahmoud and a Message

brute force, dp, greedy, strings

Artsem and Saunders

constructive algorithms, dsu, math

Timofey and a tree

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

USB vs. PS/2

greedy, implementation, sortings, two pointers

k-th divisor

math, number theory

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

Frodo and pillows

binary search, greedy

Unfair Poll

binary search, constructive algorithms, implementation, math

Felicity is Coming!

data structures, hashing, sortings, strings