Detecting a cycle in a linked list is a classic problem that comes up when you need to guard against infinite loops—whether you’re...

Merging two sorted linked lists is like merging two sorted streams of data—think combining two user event logs in chronological order....

Reversing a linked list is one of those fundamental operations that underpins many real-world tasks—reordering a playlist, undo history,...

Finding the first non‑repeating character in a string is a great warm‑up that combines practical string processing with frequency...

Today, I’m tackling the Valid Anagram problem, a classic that not only tests basic string manipulation but also real‑world pattern...

In today’s session, I’m tackling the Contains Duplicate problem, a common warm‑up that helps demonstrate your grasp of array manipulation...

Alright, you're in a technical interview and you've just been given the question: “Find the index of the first non-repeating character in...

The Two Sum Problem is one of the first stops on our journey. It’s simple enough to focus on thought process, yet rich enough to demonstrate key problem‑solving techniques. Here’s how to walk through it using our nine‑step framework.

Data structures are the bread and butter of technical interviews. They’re the tools you use to solve problems efficiently, and knowing...