Anton and Tree

dfs and similar, dp, trees

Sockets

greedy, sortings

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Bulmart

binary search, dfs and similar

Maxim and Array

constructive algorithms, data structures, greedy, math

Closing ceremony

greedy

Generate a String

dfs and similar, dp

Mishka and Interesting sum

data structures

Chris and Road

geometry, implementation

Analysis of Pathes in Functional Graph

data structures, graphs

PLEASE

combinatorics, dp, implementation, math, matrices

The Wall (hard)

dp

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Friends and Subsequences

binary search, data structures

Gifts by the List

constructive algorithms, dfs and similar, graphs, trees

Theseus and labyrinth

graphs, implementation, shortest paths

Money Transfers

constructive algorithms, data structures, greedy, sortings

Robin Hood

binary search, greedy

World Tour

graphs, shortest paths

Beautiful Subarrays

data structures, divide and conquer, strings, trees

International Olympiad

constructive algorithms, greedy, implementation, math

Divisibility Check

*special problem

Maximal Difference

*special problem

Array Sum

*special problem

Polycarp and Hay

dfs and similar, dsu, graphs, greedy, sortings

Out of Controls

*special problem

Rosetta Problem

*special problem

Without Text

*special problem

Автобус

binary search, data structures, greedy, sortings

Hostname Aliases

*special problem, binary search, data structures, implementation, sortings, strings

Little Artem and Time Machine

data structures

Fibonacci-ish

brute force, dp, hashing, implementation, math

Longest Subsequence

brute force, math, number theory

Messenger

data structures, hashing, implementation, string suffix structures, strings

Area of a Star

geometry

Arrow

geometry

Babaei and Birthday Cake

data structures, dp

Famil Door and Brackets

dp, strings

Wet Shark and Blocks

dp, matrices

New Year Tree

bitmasks, data structures, trees

Hexagons

binary search, implementation, math

Multipliers

math, number theory

Running Track

dp, greedy, strings, trees

New Year and Ancient Prophecy

dp, hashing, strings

Minimum spanning tree for each edge

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

Gadgets for dollars and pounds

binary search, greedy, two pointers

Lipshitz Sequence

data structures, math

Area of Two Circles' Intersection

geometry

Chocolate Bar

brute force, dp

Chip 'n Dale Rescue Rangers

binary search, geometry, math

Duff in Beach

dp

Weakness and Poorness

ternary search

Points on Plane

constructive algorithms, divide and conquer, geometry, greedy, sortings

Invariance of Tree

constructive algorithms, dfs and similar, greedy, trees

Bulbo

dp, greedy

Minimization

dp, greedy, sortings

Lengthening Sticks

combinatorics, implementation, math

Vitaly and Cycle

combinatorics, dfs and similar, graphs, math

Case of Fugitive

data structures, greedy, sortings

Vanya and Brackets

brute force, dp, expression parsing, greedy, implementation, strings

GukiZ and Binary Operations

combinatorics, implementation, math, matrices, number theory

Degenerate Matrix

binary search, math

Soldier and Traveling

flows, graphs, math

Paths and Trees

graphs, greedy, shortest paths

Destroying Roads

constructive algorithms, graphs, shortest paths

Quest

dp, greedy

Idempotent functions

constructive algorithms, graphs, math

Infinite Inversions

binary search, data structures, implementation, sortings, trees

Ice Cave

dfs and similar

Work Group

dfs and similar, dp, graphs, strings, trees

Points in triangle

*special problem, geometry

Levenshtein distance

*special problem

Jumping frogs

*special problem

Om Nom and Candies

brute force, greedy, math

Anya and Cubes

binary search, bitmasks, brute force, dp, math, meet-in-the-middle

Social Network

greedy, two pointers

Closest Equals

*special problem, data structures

Chicken or Fish?

greedy

Cubes

games, greedy, implementation

A and B and Lecture Rooms

binary search, data structures, dfs and similar, dp, trees

Drazil and Tiles

constructive algorithms, greedy

R2D2 and Droid Army

binary search, data structures, two pointers

Watto and Mechanism

binary search, data structures, hashing, string suffix structures, strings

Second price auction

bitmasks, probabilities

Pretty Song

math, strings

Sums of Digits

dp, greedy, implementation

Breaking Good

dfs and similar, dp, graphs, shortest paths

Misha and Permutations Summation

data structures

Array and Operations

flows, graph matchings, number theory

Distributing Parts

greedy, sortings

Obsessive String

dp, strings

Vanya and Field

math

New York Hotel

greedy, math

Restoring Increasing Sequence

binary search, brute force, greedy, implementation

Special Matrices

combinatorics, dp

Strip

binary search, data structures, dp, two pointers

Valid Sets

dfs and similar, dp, math, trees

Maximum Value

binary search, math, sortings, two pointers

Red-Green Towers

dp

CGCDSSQ

brute force, data structures, math