Array Operations: Finding Missing, Unique, and Consecutive Elements

This comprehensive tutorial on solving three specific array-related coding challenges frequently encountered in technical interviews. The author explains how to find a missing number and locate an element that appears only once in an array where all other numbers are doubled, as well as how to calculate the maximum consecutive ones. For each problem, the source guides the reader from simple brute-force methods to more efficient hashing techniques, eventually arriving at optimal solutions using mathematical formulas or bitwise XOR operations. The overarching goal is to demonstrate how to effectively communicate a thought process to an interviewer by gradually reducing time and space complexity. By highlighting pitfalls like integer overflow, the material serves as a practical guide for mastering data structures and algorithms.