Efficient Bit Manipulation for Odd-Even Swap

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Introduction

In computer science, bitwise operations are used to manipulate individual bits of a binary number. One common problem is to swap the odd and even bits of a positive integer. This can be achieved with as few operations as possible using bitwise operators.


Skills Graph

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Pairwise Swap

Problem

Given a positive integer, swap the odd and even bits with as few operations as possible. For example, if the input is 1001 1111 0110, the output should be 0110 1111 1001.

Requirements

The following requirements must be met:

  • The input is always a positive integer.
  • The program works with 32 bits.
  • The output is an integer.
  • The inputs are valid (not None).
  • The program fits memory.

Example Usage

The following examples illustrate the usage of the program:

  • None -> Exception
  • 0 -> 0
  • -1 -> -1
  • General case:
    input  = 1001 1111 0110
    result = 0110 1111 1001

Summary

In this challenge, we learned how to swap the odd and even bits of a positive integer using bitwise operators. The program meets the requirements and can be used to solve similar problems.

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