Answered: Single number (use XOR): Given a…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Single number (use XOR):

Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.

You must implement a solution with a linear runtime complexity and use only constant extra space.

Code in Java

A brief explanation of how and why your code works and how it relates to the concepts learned (for example, it uses bitwise operation, stack, or takes into account a word size).

Expert Solution

Algorithm:

Start.
Take the array.
Now do XOR of each number with other and return.
Since XOR of same number is zero.
So we will return the maximum sum of difference between the consecutive elements that will tell which of them is not repeated.
Print.
Exit.

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