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Cracking coding interviews at top tech companies like Amazon, Google, and Microsoft demands more than just textbook knowledge; it takes pattern recognition, optimal thinking, and hands-on practice with real interview problems.
Preparing for coding interviews? This blog series shall help you practice some of the most commonly asked data structure problems in top tech companies. Each post will include: A clear explanation of the problem A simple and efficient solution (in ...
📝 Problem Statement Given a string A, find and return the index of the first non-repeating character.If there is no such character, return -1. 📚 Constraints 1 ≤ |A| ≤ 10⁵ A contains only lowercase English letters. 🎯 Objective You are given a s...
Problem Statement Given the head of a linked list, remove the nth node from the end of the list and return its head. Examples Example 1: Input: head = [1,2,3,4,5], n = 2 Output: [1,2,3,5] Explanation: The 2nd node from the end is the node with value...
🧨 A Broken Code Story A developer had written this beautiful function to find duplicate user accounts. Worked like a charm in testing with a sample dataset of 50 users. The tech lead approved it and was shipped it to production. Two hours later, the...
