Non-Secret Cypher

two pointers

Surrounded

geometry

Stack

*special problem, expression parsing, implementation

Array Sorting

*special problem, implementation

Heaven Tour

data structures, greedy

BRT Contract

data structures

Weak Memory

dfs and similar, dsu

AlgoRace

dp, shortest paths

Soap Time! - 2

binary search, data structures

Visit of the Great

math, number theory

Clever Fat Rat

dp

Mushroom Scientists

math, ternary search

Candy Shop

greedy

T-shirt

dp, greedy, probabilities

Cyclic Coloring

dfs and similar

Zoo

brute force, geometry

Headquarters

constructive algorithms, math

Wooden Fence

dp

Optimal Sum

data structures, greedy

Battlefield

geometry, graphs, implementation, shortest paths

Cubes

binary search, dp, two pointers

Name

greedy, strings

Divisibility Rules

math, number theory

Defragmentation

implementation

Representative Sampling

Representative Sampling

dp, sortings, strings

Representative Sampling

The Beaver's Problem - 2

The Beaver's Problem - 2

The Beaver's Problem - 2

Magic Squares

Magic Squares

Smart Beaver and Resolving Collisions

Smart Beaver and Resolving Collisions

Smart Beaver and Resolving Collisions

Greedy Merchants

Greedy Merchants

Greedy Merchants

Fibonacci Strings

matrices, strings

Fibonacci Strings

strings

Script Generation

Script Generation

Space Voyage

binary search

Space Voyage

binary search

Archaeology

data structures, dfs and similar, trees

Hyper String

dp

Playing with Superglue

combinatorics, constructive algorithms

Word Cut

dp

Gnomes of Might and Magic

data structures, graphs, implementation, shortest paths

Power Defence

brute force, dp, geometry, greedy

Plane of Tanks: Duel

brute force, dp, math, probabilities

Geometry Horse

greedy, implementation, sortings, two pointers

Range Increments

data structures, greedy

Camping Groups

data structures, sortings

Deputies

constructive algorithms, graphs, greedy, implementation

Spiral Maximum

brute force, dp

Chamber of Secrets

dfs and similar, shortest paths

BHTML+BCSS

*special problem, dfs and similar, expression parsing

A polyline

*special problem, implementation

Mysterious numbers - 2

*special problem

ucyhf

*special problem, brute force, implementation, number theory

MYSTERIOUS LANGUAGE

*special problem

A Piece of Cake

*special problem, implementation

Wizards and Minimal Spell

implementation, strings

Wizards and Bets

dfs and similar, graphs, math, matrices

Wizards and Roads

data structures, divide and conquer, graph matchings, graphs, greedy

Wizards and Numbers

games, math

Wizards and Huge Prize

dp, math, probabilities

Wizards and Trolleybuses

implementation, math

Shoe Store

dp, graph matchings, greedy, sortings, two pointers

Polygons

geometry, sortings

Compatible Numbers

bitmasks, brute force, dfs and similar, dp

Beard Graph

data structures, dsu, trees

Another Problem on Strings

binary search, brute force, dp, math, strings, two pointers

Polycarpus and Tasks

Minimum Diameter

binary search, brute force

Machine Programming

flows, graphs

Ancient Berland Hieroglyphs

two pointers

Variable, or There and Back Again

dfs and similar, graphs

e-Government

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

Large Refrigerator

brute force

Conveyor

sortings, two pointers

Lemmings

binary search

Substring and Subsequence

dp

Brackets

*special problem

Truncatable primes

*special problem

Alternating case

*special problem

Non-decimal sum

*special problem

Factorial zeros

*special problem

HQ9+

*special problem

Remove digits

*special problem

Prime factorization

*special problem

Binary notation

*special problem

Polycarpus the Safecracker

brute force, dp

Distance in Tree

dfs and similar, dp, trees

Abracadabra

divide and conquer

Discounts

constructive algorithms, greedy, sortings

Buses and People

binary search, data structures, sortings

Edges in MST

dfs and similar, dsu, graphs, sortings

Find Pair

implementation, math, sortings