Rabin–Karp Algorithm Explained Visually
Learn the Rabin–Karp algorithm step by step: hash the pattern, slide a rolling hash over the text, compare hashes, and verify matches to avoid false positives. Perfect for coding interviews and CS exams.
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What you’ll learn
Naive vs Rabin–Karp: why hashing speeds up search
Rolling hash intuition: remove left, shift, add right
Hash match → character verification to avoid collisions
Expected vs worst-case time, and when to use KMP instead
Timestamps
00:00 Intro & problem setup
00:04 Naive approach (why it’s slow)
00:17 Core idea of Rabin–Karp
00:32 Hash match → verify characters
01:00 Complexity: expected O(n + m), worst case
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