Remove duplicate values from unsorted array

Given an unsorted array of integers, print distinct array elements while maintaining the order of elements of the original array.

Coding books recommendations:

For Algorithms and Data Structures Interview Prep:
1. Cracking the Coding Interview: 189 Programming Questions and Solutions
https://amzn.to/2Gf8xOh
2. Data Structures and Algorithms in Java (2nd Edition)
https://amzn.to/34Tusou
3. Data Structures and Algorithms in Java (by Goodrich)
https://amzn.to/34TTBzr
4. Elements of Programming Interviews in Python: The Insiders' Guide
https://amzn.to/31MuzAi
5. Data Structures and Algorithms in Python
https://amzn.to/2Dq4IVG
6. Data Structures and Algorithms in C++
https://amzn.to/2QNKpVb

For Algorithms and Data Structures concepts
1. Introduction to Algorithms, 3rd Edition (Cormen)
https://amzn.to/31OXwf2
2. Classic Data Structures (Samanta)
https://amzn.to/2YWhVNz

For System Design Interview Prep:
1. System Design Interview – An insider's guide, Second Edition: Step by Step Guide, Tips and 15 System Design Interview Questions with Detailed Solutions
https://amzn.to/2QLsXk6

For JAVA programming:
1. Java: The Complete Reference, Eleventh Edition
https://amzn.to/32KHaTT

For Beginners in Computer Science:
1. Computer Science Distilled: Learn the Art of Solving Computational Problems
https://amzn.to/2EYSkMt


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