You are given a sequence of 16N positive integers a1, a2, . . . , a 16N - You may shuffle this sequence in any way you choose, i.e. change it to any one of its permutations. Then, let (a1 Ð a2) ® (az Ð a4) ® ..® (a8N–1 O asn), y = (asN+1 Ð asN+2) ® (asN+3 Ð a8N+4) ® ...® (@16N–1 0 ¤16N), where O and O denote bitwise AND and XOR respectively. Find the maximum possible value of x – y.

You are given a sequence of 16N positive integers a1, a2, . . . , a 16N - You may shuffle this sequence in any way you choose, i.e. change it to any one of its permutations. Then, let (a1 Ð a2) ® (az Ð a4) ® ..® (a8N–1 O asn), y = (asN+1 Ð asN+2) ® (asN+3 Ð a8N+4) ® ...® (@16N–1 0 ¤16N), where O and O denote bitwise AND and XOR respectively. Find the maximum possible value of x – y.

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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Concept explainers

Operations

In mathematics and computer science, an operation is an event that is carried out to satisfy a given task. Basic operations of a computer system are input, processing, output, storage, and control.

Basic Operators

An operator is a symbol that indicates an operation to be performed. We are familiar with operators in mathematics; operators used in computer programming are—in many ways—similar to mathematical operators.

Division Operator

We all learnt about division—and the division operator—in school. You probably know of both these symbols as representing division:

Modulus Operator

Modulus can be represented either as (mod or modulo) in computing operation. Modulus comes under arithmetic operations. Any number or variable which produces absolute value is modulus functionality. Magnitude of any function is totally changed by modulo operator as it changes even negative value to positive.

Operators

In the realm of programming, operators refer to the symbols that perform some function. They are tasked with instructing the compiler on the type of action that needs to be performed on the values passed as operands. Operators can be used in mathematical formulas and equations. In programming languages like Python, C, and Java, a variety of operators are defined.

Question

Using C++ only

Example Input
1
1 1 1 2 1 1 1 2 1 1 1 2 1 1 1 2

Example Output
3

You are given a sequence of 16N positive integers a1, a2, . . ., a16N · You may
shuffle this sequence in any way you choose, i.e. change it to any one of its
permutations. Then, let
x = (a1 Ð a2) & (az O a4) ® . ..® (a8N-1 O asN),
y = (a8N+1 Ð a8N+2) ® (a8N+3 O a8N+4) ® ...® (@16N–1 O a16N),
where ® and O denote bitwise AND and XOR respectively.
Find the maximum possible value of x – y.

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