Anton and School

bitmasks, constructive algorithms, implementation, math

Anton and Tree

dfs and similar, dp, trees

Drivers Dissatisfaction

data structures, dsu, graphs, trees

Sleep in Class

constructive algorithms, data structures, math, two pointers

Tourist Reform

dfs and similar, graphs

Sockets

greedy, sortings

Funny Game

dp, games

80-th Level Archeology

brute force, data structures, greedy, sortings

Expression Queries

data structures

Roads Orientation Problem

graphs

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Ber Patio

Award Ceremony

greedy, implementation

Running Over The Bridges

greedy, implementation, math

Bulmart

binary search, dfs and similar

Financiers Game

dp

Polycarp's problems

binary search, dp, greedy

Games on a CD

data structures, hashing, string suffix structures, strings

Messages on a Tree

Family Photos

games, greedy

Too Much Money

brute force, greedy

Xor-matic Number of the Graph

bitmasks, graphs, math, number theory, trees

Uniformly Branched Trees

combinatorics, dp, trees

Goods transportation

dp, flows, greedy

st-Spanning Tree

dsu, graphs, greedy, implementation

One-Way Reform

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

Cyclic Cipher

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

Research Rover

combinatorics, dp

Road to Home

binary search, dp

Maxim and Array

constructive algorithms, data structures, greedy, math

Array Covering

data structures

Cipher

implementation

Slalom

data structures, dp, sortings

Homework

constructive algorithms

Cactusophobia

dfs and similar, flows

Closing ceremony

greedy

Matvey's Birthday

bitmasks, graphs

Andrew and Chemistry

dp, hashing, trees

Sasha and Array

data structures, math, matrices

Cowboy Beblop at his computer

geometry

Pokermon League challenge

math, probabilities

Underfail

flows

Heroes of Making Magic III

data structures

R3D3’s Summer Adventure

dp, greedy

Festival Organization

combinatorics, math, number theory

Complete the Permutations

combinatorics, fft, graphs, math

Create a Maze

constructive algorithms

Digit Tree

dfs and similar, divide and conquer, dsu, trees

Complete The Graph

binary search, constructive algorithms, graphs, shortest paths

Sonya Partymaker

binary search, dp

Animals and Puzzle

binary search, data structures

Sonya and Problem Wihtout a Legend

dp, sortings

Searching Rectangles

binary search, constructive algorithms, interactive

Memory and Casinos

data structures, math, probabilities

Memory and Scores

combinatorics, dp, math

ZS and The Birthday Paradox

math, number theory, probabilities

String Set Queries

brute force, data structures, hashing, interactive, string suffix structures, strings

Generate a String

dfs and similar, dp

Two Arithmetic Progressions

math, number theory

Student's Camp

dp, math

Incorrect Flow

flows

Centroids

data structures, dfs and similar, dp, graphs, greedy, trees

Garlands

data structures

Persistent Bookcase

bitmasks, data structures, dfs and similar, implementation

Working routine

data structures, implementation

Iron Man

data structures, geometry, trees

Captain America

flows, greedy

Black Widow

dp, graphs, implementation, math

Ant Man

dp, graphs, greedy

Mishka and Divisors

dp, number theory

Mishka and Interesting sum

data structures

Chris and Road

geometry, implementation

T-Shirts

data structures

Analysis of Pathes in Functional Graph

data structures, graphs

Cool Slogans

string suffix structures, strings

Huffman Coding on Segment

data structures, greedy

Break Up

dfs and similar, graphs

Coprime Permutation

combinatorics, number theory

Cron

Limak and Shooting Points

brute force, geometry, math

LRU

bitmasks, dp, math, probabilities

...Dary!

binary search, geometry, two pointers

...Wait for it...

data structures, dsu, trees

Legen...

data structures, dp, matrices, strings

PLEASE

combinatorics, dp, implementation, math, matrices

Couple Cover

brute force, dp, number theory

Tree of Life (hard)

trees

Tree of Life (medium)

constructive algorithms, hashing, trees

Photographs (II)

The Wall (hard)

dp

Brain Network (hard)

trees

Recover Polygon (hard)

data structures

Recover Polygon (medium)

geometry

Collective Mindsets (hard)

Collective Mindsets (medium)

Mike and Geometry Problem

combinatorics, data structures, dp, geometry, implementation

Friends and Subsequences

binary search, data structures

TOF

dfs and similar, graphs

Dividing Kingdom II

brute force, data structures, dsu, graphs, sortings

Travelling Through the Snow Queen's Kingdom

bitmasks, brute force, divide and conquer, graphs