Copy of a Copy of a Copy

constructive algorithms, dfs and similar, graphs, implementation, sortings

Olympiad in Programming and Sports

dp, flows, graphs, greedy

Wires

dfs and similar, graphs, greedy

Olya and magical square

constructive algorithms, implementation, math

Tesla

constructive algorithms, implementation

Letters Removing

data structures, strings

Minimal Diameter Forest

constructive algorithms, dfs and similar, greedy, trees

Careful Maneuvering

bitmasks, brute force, geometry

Restoring Increasing Sequence

binary search, brute force, greedy, implementation

New Year Letter

bitmasks, brute force, dp

Second price auction

bitmasks, probabilities

The Harmonization of XOR

bitmasks, constructive algorithms, greedy, math

Sereja and Periods

binary search, dfs and similar, strings

Build String

flows, graphs

The Unbearable Lightness of Weights

dp, math

Santa Claus and Tangerines

binary search, data structures, greedy, two pointers

Rectangle Puzzle

geometry

Vladik and Favorite Game

constructive algorithms, dfs and similar, graphs, interactive

Berland and the Shortest Paths

brute force, dfs and similar, graphs, shortest paths

Beard Graph

data structures, dsu, trees

Vasya's Function

binary search, implementation, math

Little Girl and Problem on Trees

data structures, graphs, trees

Devu and Birthday Celebration

combinatorics, dp, math

Nice table

brute force, constructive algorithms, greedy, math

Police Patrol

greedy, implementation, math, ternary search

Duff in Beach

dp

Vanya and Brackets

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

Number Busters

binary search, math

Boredom

data structures

Okabe and El Psy Kongroo

dp, matrices

Follow Traffic Rules

implementation, math

Bubble Strike

combinatorics, math, probabilities, ternary search

Magic Trick

combinatorics, math, probabilities

Cactus

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

Ilya and Roads

dp

Below the Diagonal

constructive algorithms, greedy, math

Digital Root

number theory

Performance Review

data structures

Caisa and Tree

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

Main Sequence

greedy, implementation

Mahmoud and Ehab and the function

binary search, data structures, sortings

Counter Attack

data structures, dsu, graphs, hashing, sortings

Interesting Game

dp, games, math

New Roads

constructive algorithms, graphs, trees

Black and White Tree

constructive algorithms, dsu, graphs, greedy, trees

Weak Memory

dfs and similar, dsu

Trip to Saint Petersburg

data structures

Fragile Bridges

dp

Changing a String

dp

Tree-String Problem

*special problem, dfs and similar, hashing, strings

MYSTERIOUS LANGUAGE

*special problem

Yet Another Number Game

dp, games

Intersection

implementation, math

Coin Troubles

dp

Guide

Compartments

combinatorics, constructive algorithms, greedy, implementation

Dima and Trap Graph

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

Getting Deals Done

binary search, data structures

Neural Network country

dp, matrices

Something with XOR Queries

brute force, interactive, probabilities

Hydra

graphs, sortings

Berland University

greedy, math

Mysterious Code

dp, strings

Dynamic Problem Scoring

brute force, greedy

Sofa Thief

brute force, implementation

Petya and Spiders

bitmasks, dp, dsu

Job Lookup

constructive algorithms, dp, shortest paths, trees

Level Generation

binary search, math, ternary search

Circular Mirror

binary search, combinatorics, geometry, math, two pointers

Optimal Polygon Perimeter

dp, geometry

Last Chance

data structures, implementation, strings

Idempotent functions

constructive algorithms, graphs, math

First Digit Law

dp, math, probabilities

Subway Innovation

greedy, math, two pointers

Knights

geometry, graphs, shortest paths, sortings

Circle of Numbers

brute force, dfs and similar, implementation

Nanami's Digital Board

dsu, implementation

Frog Jumping

dfs and similar, math, number theory

Numbers

constructive algorithms, implementation

Valera and Swaps

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

Encryption (medium)

dp

Lemmings

binary search

String Mark

combinatorics, math, strings

Little Elephant and Furik and Rubik

math, probabilities

Journey

brute force, constructive algorithms, implementation

Number Transformation

dp, greedy, number theory

Bulmart

binary search, dfs and similar

Start of the session

constructive algorithms

World Eater Brothers

dfs and similar, dp, greedy, trees

Village (Minimum)

*special problem, dp, greedy, trees

Maximum Questions

data structures, dp, strings

Bulbo

dp, greedy

Seller Bob

brute force, dp, greedy

Longest Array Deconstruction

data structures, divide and conquer, dp, sortings

Playlist

math, probabilities, sortings

Hexagons

binary search, implementation, math

Right Expansion Of The Mind

math

Social Network

greedy, two pointers

Minimal Product

Beautiful IP Addresses

brute force