Caisa and Tree

brute force, dfs and similar, math, number theory, trees

Duff in Beach

dp

Yet Another Number Game

dp, games

Neural Network country

dp, matrices

Performance Review

data structures

Below the Diagonal

constructive algorithms, greedy, math

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

New Roads

constructive algorithms, graphs, trees

Interesting Game

dp, games, math

Village (Minimum)

*special problem, dp, greedy, trees

Intersection

implementation, math

Weak Memory

dfs and similar, dsu

Job Lookup

constructive algorithms, dp, shortest paths, trees

Fragile Bridges

dp

Trip to Saint Petersburg

data structures

Main Sequence

greedy, implementation

Level Generation

binary search, math, ternary search

Dima and Trap Graph

binary search, data structures, dfs and similar, dsu, shortest paths, two pointers

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Petya and Spiders

bitmasks, dp, dsu

Guide

Berland University

greedy, math

First Digit Law

dp, math, probabilities

Coin Troubles

dp

Compartments

combinatorics, constructive algorithms, greedy, implementation

Longest Array Deconstruction

data structures, divide and conquer, dp, sortings

Sofa Thief

brute force, implementation

Mysterious Code

dp, strings

Subway Innovation

greedy, math, two pointers

Optimal Polygon Perimeter

dp, geometry

Something with XOR Queries

brute force, interactive, probabilities

Getting Deals Done

binary search, data structures

Last Chance

data structures, implementation, strings

Hydra

graphs, sortings

Start of the session

constructive algorithms

Dynamic Problem Scoring

brute force, greedy

Encryption (medium)

dp

Knights

geometry, graphs, shortest paths, sortings

Idempotent functions

constructive algorithms, graphs, math

There and Back Again

String Mark

combinatorics, math, strings

Numbers

constructive algorithms, implementation

Little Elephant and Furik and Rubik

math, probabilities

Frog Jumping

dfs and similar, math, number theory

Valera and Swaps

constructive algorithms, dsu, graphs, implementation, math, string suffix structures

Area of a Star

geometry

Circle of Numbers

brute force, dfs and similar, implementation

A Piece of Cake

*special problem, implementation

Right Expansion Of The Mind

math

Journey

brute force, constructive algorithms, implementation

Lemmings

binary search

Nanami's Digital Board

dsu, implementation

Seller Bob

brute force, dp, greedy

Maximum Questions

data structures, dp, strings

Minimal Product

World Eater Brothers

dfs and similar, dp, greedy, trees

Flag 2

dp

Number Transformation

dp, greedy, number theory

Hidden Fortress

interactive, math

Bulmart

binary search, dfs and similar

Chocolate

dfs and similar, implementation

Bulbo

dp, greedy

Xor

brute force

Beavermuncher-0xFF

dfs and similar, dp, dsu, greedy, trees

Runner's Problem

dp, matrices, sortings

Playlist

math, probabilities, sortings

Hexagons

binary search, implementation, math

Chessboard Billiard

dfs and similar, dsu, graphs, number theory

The table

constructive algorithms, greedy

Exploration plan

binary search, flows, graph matchings, shortest paths

Rosetta Problem

*special problem

Social Network

greedy, two pointers

Field Photography

bitmasks, data structures, sortings

Inna and Binary Logic

binary search, bitmasks, data structures

Vasily the Bear and Beautiful Strings

combinatorics, math, number theory

Beautiful IP Addresses

brute force

Heidi Learns Hashing (Medium)

brute force, number theory

Little Elephant and Shifts

data structures

Maximize The Value

data structures, sortings

Hostname Aliases

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

Blueprint for Seating

combinatorics, divide and conquer, math

Daleks' Invasion (medium)

dfs and similar, graphs, shortest paths, trees

Fools and Foolproof Roads

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

Death Stars (medium)

hashing, strings

Elections

brute force

Log Stream Analysis

binary search, brute force, implementation, strings

Tanya and Colored Candies

*special problem, dp

Education Reform

dp

Blackboard Fibonacci

brute force, math

What Has Dirichlet Got to Do with That?

dp, games

Berland Elections

greedy, sortings

Third Month Insanity

dp, probabilities, trees

Inna and Sequence

binary search, data structures, dp, trees

Space Rescuers

geometry, ternary search

Kids' Riddle

*special problem

Parquet

combinatorics, constructive algorithms, greedy, implementation

Casinos and travel

dp

Closing ceremony

greedy

Table with Letters - 2

brute force, two pointers

General Mobilization

data structures, dfs and similar, sortings