OR in Matrix

greedy, hashing, implementation

Fedor and Essay

dfs and similar, dp, graphs, hashing, strings

Gargari and Bishops

greedy, hashing, implementation

Permutation

data structures, divide and conquer, hashing

DZY Loves Strings

binary search, hashing, strings, two pointers

Sereja and Squares

binary search, data structures, hashing

Largest Submatrix 3

dp, hashing

Xenia and String Problem

dp, hashing, implementation, string suffix structures, strings

Looking for Owls

binary search, data structures, geometry, hashing, sortings

Have You Ever Heard About the Word?

greedy, hashing, string suffix structures, strings

Good Substrings

hashing, strings

Tree-String Problem

*special problem, dfs and similar, hashing, strings

Queries for Number of Palindromes

dp, hashing, strings

King's Path

dfs and similar, graphs, hashing, shortest paths

Fractal Detector

dp, hashing

Two Permutations

data structures, hashing, strings

Polycarpus is Looking for Good Substrings

bitmasks, hashing, implementation

The Next Good String

data structures, greedy, hashing, strings

Counter Attack

data structures, dsu, graphs, hashing, sortings

Common Divisors

brute force, hashing, implementation, math, strings

Double Profiles

graphs, hashing, sortings

String

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

Password

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

String Transformation

hashing, strings

Petr#

brute force, data structures, hashing, strings

Sets

constructive algorithms, hashing, implementation

Beaver

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

Harry Potter and the Sorting Hat

brute force, dfs and similar, hashing

Cutting Jigsaw Puzzle

hashing, implementation

Spelling Check

hashing, implementation, strings

Tricky and Clever Password

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

Don't fear, DravDe is kind

binary search, data structures, dp, hashing

Test

hashing, strings

Deletion of Repeats

greedy, hashing, string suffix structures

Palindrome Degree

hashing, strings

Registration System

data structures, hashing, implementation

Winner

hashing, implementation