Euler tour

constructive algorithms, trees

Distinctification

data structures, dsu, greedy

The Shortest Statement

graphs, shortest paths, trees

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Bicolorings

bitmasks, dp

Vasya and Multisets

dp, greedy, implementation, math

Relatively Prime Pairs

greedy, math, number theory

Vasya And Password

greedy, implementation, strings

Cover Points

geometry, math

Little C Loves 3 I

math

Say Hello

geometry

Splitting money

implementation

Space Formula

greedy

Moonwalk challenge

data structures, strings, trees

Palindrome Pairs

strings

Self-exploration

math

AI robots

data structures

Shady Lady

geometry, math

Ancient civilizations

constructive algorithms, geometry

Interstellar battle

probabilities, trees

Hyperspace Highways

dfs and similar, graphs, trees

Space Isaac

hashing, number theory

Last chance

flows, graph matchings

Leaf Sets

data structures, dfs and similar, dsu, greedy, sortings, trees

Vasya and Magic Matrix

dp, math, probabilities

Petya and Array

data structures, divide and conquer, two pointers

Array Product

constructive algorithms, greedy, math

Vitamins

bitmasks, brute force, dp, implementation

Benches

binary search, implementation

Ray in the tube

data structures, divide and conquer, dp, math

Tree Reconstruction

constructive algorithms, data structures, graphs, greedy

Glider

binary search, data structures, two pointers

Coffee Break

data structures, greedy, two pointers

Buying a TV Set

math

Heist

greedy, implementation, sortings

Shashlik Cooking

dp, greedy, math

Palindrome Dance

greedy

Summer Oenothera Exhibition

data structures

You Are Given a Tree

data structures, dp, trees

Network Safety

dfs and similar, dsu, graphs, math, sortings

Subway Pursuit

binary search, probabilities

Timetable

constructive algorithms, data structures, greedy, math

Wrap Around

dp, strings

Maximum Matching

bitmasks, brute force, dfs and similar, dp, graphs

Slime

dp, greedy, implementation

Gambling

greedy, sortings

Non-Coprime Partition

constructive algorithms, math

Equality

implementation, strings

Security

data structures, string suffix structures

A Game on Strings

games

Maximum Reduction

combinatorics, data structures, math

Trips

graphs

Valid BFS?

dfs and similar, graphs, shortest paths, trees

Equalize

dp, greedy, strings

Reach Median

greedy

Packets

constructive algorithms, greedy, math

Sources and Sinks

bitmasks, brute force, dfs and similar

Relatively Prime Powers

combinatorics, math, number theory

Covered Points

fft, geometry, number theory

Vasya and Arrays

greedy, two pointers

Classy Numbers

combinatorics, dp

Diagonal Walking v.2

math

Function Height

math

Little C Loves 3 III

bitmasks, dp, math

Intervals of Intervals

binary search, data structures, two pointers

Region Separation

combinatorics, dp, number theory, trees

Little C Loves 3 II

brute force, constructive algorithms, flows, graph matchings

Enlarge GCD

number theory

Linear Congruential Generator

number theory

Putting Boxes Together

data structures

Vasya and Good Sequences

bitmasks, dp

Vasya and Triangle

geometry

Vasya and Golden Ticket

implementation

Vasya and Cornfield

geometry

In Search of an Easy Problem

implementation

Multicolored Markers

binary search, math, number theory

Tree with Small Distances

dp, greedy

Concatenated Multiples

implementation, math

Maximal Intersection

greedy, math, sortings

Creating the Contest

dp, greedy, math

Many Equal Substrings

implementation, strings

Make Square

math

Guess the number

dp

Make Symmetrical

brute force

Restore Array

constructive algorithms

Order book

combinatorics, data structures, greedy

Rectangles

geometry, implementation, sortings

Unnatural Conditions

constructive algorithms, math

Find Square

implementation

X-mouse in the Campus

bitmasks, math, number theory

Session in BSU

binary search, dfs and similar, dsu, graph matchings, graphs

Inverse Coloring

combinatorics, dp, math

Mouse Hunt

dfs and similar, graphs

Minimum Value Rectangle

greedy

Numbers on the Chessboard

implementation

Palindromic Twist

implementation, strings

Company Acquisitions

constructive algorithms, math

Disjoint Triangles

geometry

Colored Cubes

constructive algorithms, implementation, matrices

Recovering BST

brute force, dp, math, number theory, trees