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15 Coding Patterns That Cover Most Interview Problems

HireAI Career TeamPublished: Feb 17, 20268 min read

Top Algorithmic Patterns Demystified

- Sliding Window: Optimal for contiguous subarray/substring problems seeking min/max length. - Two Pointers: Ideal for sorted arrays, palindrome verification, and target pair sums. - Fast & Slow Pointers (Floyd's Cycle): Cycle detection in linked lists and array sequences. - Monotonic Stack: Next Greater Element, Daily Temperatures, and histogram areas. - Top K Elements (Heaps): Finding largest/smallest K items in streaming data.

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Frequently Asked Questions

Why is pattern recognition superior to raw problem counts?

A single pattern unlocks dozens of problem variations. Understanding the mechanics of Sliding Window allows you to solve 30+ medium-level problems with minimal adaptation.