Registration System

data structures, hashing, implementation

Winner

hashing, implementation

Vitaliy and Pie

greedy, hashing, strings

OR in Matrix

greedy, hashing, implementation

Password

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

Equivalent Strings

divide and conquer, hashing, sortings, strings

Gargari and Bishops

greedy, hashing, implementation

Bear and Three Musketeers

brute force, dfs and similar, graphs, hashing

Zero Quantity Maximization

hashing, math, number theory

Common Divisors

brute force, hashing, implementation, math, strings

Watto and Mechanism

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

Kostya the Sculptor

data structures, hashing

King's Path

dfs and similar, graphs, hashing, shortest paths

Complete Tripartite

brute force, constructive algorithms, graphs, hashing, implementation

Treasure Island

dfs and similar, dp, flows, hashing

Sasha and One More Name

constructive algorithms, hashing, strings

Camp Schedule

greedy, hashing, strings

Compress Words

brute force, hashing, implementation, string suffix structures, strings

Queries for Number of Palindromes

dp, hashing, strings

Tavas and Malekas

greedy, hashing, string suffix structures, strings

Palindromic characteristics

brute force, dp, hashing, strings

Felicity is Coming!

data structures, hashing, sortings, strings

New Year and Ancient Prophecy

dp, hashing, strings

Palindrome Degree

hashing, strings

Palindrome Pairs

hashing, strings

Fibonacci-ish

brute force, dp, hashing, implementation, math

Ray Tracing

greedy, hashing, implementation, math, number theory, sortings

Spy Syndrome 2

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

Correcting Mistakes

constructive algorithms, dp, greedy, hashing, strings, two pointers

Petr#

brute force, data structures, hashing, strings

Sets

constructive algorithms, hashing, implementation

Two strings

binary search, hashing, two pointers

String

brute force, constructive algorithms, hashing, implementation, string suffix structures, strings

Messenger

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

Double Profiles

graphs, hashing, sortings

Spelling Check

hashing, implementation, strings

Om Nom and Necklace

hashing, string suffix structures, strings

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Beaver

data structures, dp, greedy, hashing, strings, two pointers

LIS of Sequence

data structures, dp, greedy, hashing, math

Test

hashing, strings

Bear and Polynomials

hashing, implementation, math

Kefa and Watch

data structures, hashing, strings

Check Transcription

brute force, data structures, hashing, strings

President and Roads

dfs and similar, graphs, hashing, shortest paths

Tree-String Problem

*special problem, dfs and similar, hashing, strings

The Untended Antiquity

data structures, hashing

Sereja and Squares

binary search, data structures, hashing

Swapping Characters

brute force, hashing, implementation, strings

Good Substrings

hashing, strings

Isomorphic Strings

hashing, strings

Zip-line

binary search, data structures, dp, hashing

Acyclic Organic Compounds

data structures, dfs and similar, dsu, hashing, strings, trees

Counter Attack

data structures, dsu, graphs, hashing, sortings

Death Stars (medium)

hashing, strings

Marbles

hashing, strings

Restoring the Expression

brute force, hashing, math

Encoding

hashing, string suffix structures, strings

Frequency of String

hashing, string suffix structures, strings

Peterson Polyglot

brute force, dfs and similar, dsu, hashing, strings, trees

Deletion of Repeats

greedy, hashing, string suffix structures

The Supersonic Rocket

geometry, hashing, strings

Labelling Cities

dfs and similar, graphs, hashing

Abbreviation

dp, hashing, strings

Ann and Books

data structures, flows, hashing

Cutting Jigsaw Puzzle

hashing, implementation

Morse Code

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

String Compression

dp, hashing, string suffix structures, strings

String Set Queries

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

Complete Mirror

constructive algorithms, dfs and similar, dp, hashing, implementation, trees

The Number of Subpermutations

brute force, data structures, divide and conquer, hashing, math

Stack Exterminable Arrays

data structures, divide and conquer, dp, hashing

Permutation

data structures, divide and conquer, hashing

DZY Loves Strings

binary search, hashing, strings, two pointers

Games on a CD

data structures, hashing, string suffix structures, strings

Vasya and Big Integers

binary search, data structures, dp, hashing, strings

Two Permutations

data structures, hashing, strings

Liar

binary search, dp, hashing, string suffix structures

Fractal Detector

dp, hashing

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Superhero's Job

dfs and similar, dp, hashing, math, number theory

Largest Submatrix 3

dp, hashing

Tricky and Clever Password

binary search, constructive algorithms, data structures, greedy, hashing, strings

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

And Yet Another Bracket Sequence

data structures, greedy, hashing, string suffix structures, strings

Space Isaac

hashing, number theory

Vicky's Delivery Service

data structures, dsu, graphs, hashing

Have You Ever Heard About the Word?

greedy, hashing, string suffix structures, strings

Simplified Nonogram

bitmasks, dp, hashing, meet-in-the-middle

Indie Album

data structures, dfs and similar, hashing, string suffix structures, strings, trees

The Next Good String

data structures, greedy, hashing, strings

Berland Local Positioning System

constructive algorithms, greedy, hashing, implementation

String Transformation

hashing, strings

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

k-substrings

binary search, hashing, string suffix structures

Berland SU Computer Network

dfs and similar, hashing, trees

Andrew and Chemistry

dp, hashing, trees

Timofey and a flat tree

data structures, graphs, hashing, shortest paths, trees

Misha and LCP on Tree

binary search, dfs and similar, hashing, string suffix structures, trees

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings