Kmp

4 articles

dsa2 min read

String Algorithms — Complete Guide (KMP, Z, Rolling Hash, Suffix Array)

Master advanced string algorithms: KMP failure function for O(n) pattern matching, Z-algorithm for all prefix matches, Rabin-Karp rolling hash, and suffix arrays for substring queries.

March 1, 2025Read →

dsa2 min read

KMP Algorithm — O(n+m) Pattern Matching with Failure Function

Implement KMP string search: build the failure function (LPS array) in O(m) then search in O(n). Never re-examines matched characters unlike naive search.

March 1, 2025Read →

dsa2 min read

Shortest Palindrome — KMP on Reversed String

Add minimum characters to the front of a string to make it a palindrome. KMP trick: concatenate s + '#' + rev(s), find the LPS value at the last position.

March 1, 2025Read →

dsa2 min read

String Algorithms — Master Recap and Pattern Cheatsheet

Complete recap of all 20 string algorithm problems: pattern recognition guide, algorithm selection, and complexity reference.

March 1, 2025Read →