bshuffll Algorithm
The bshuffll algorithm, also known as bitonic shuffle algorithm, is a parallel sorting algorithm primarily used for highly parallel architectures such as GPUs and SIMD processors. It is based on the concept of a bitonic sequence, which is a sequence that first increases monotonically and then decreases monotonically, or vice versa. The algorithm works by iteratively comparing, swapping, and merging elements in the input data to create an ordered bitonic sequence. One of its key advantages is its suitability for implementation on parallel processing architectures, as it allows for significant speedup by performing multiple comparisons and swaps simultaneously.
The bshuffll algorithm operates in two main stages: the bitonic creation phase and the bitonic merging phase. In the bitonic creation phase, the algorithm first constructs smaller bitonic sequences by iteratively comparing and swapping elements within the input data. These smaller sequences are then merged to form increasingly larger bitonic sequences. In the bitonic merging phase, the algorithm repeatedly splits the bitonic sequence into two equal halves and reverses the order of one half to create two sorted subsequences. It then iteratively merges the subsequences, comparing and swapping elements as necessary, until the final sorted sequence is produced. Overall, the bshuffll algorithm exhibits a complexity of O(log^2(n)) for an input size of n, making it an efficient choice for parallel sorting tasks.
//
// Bshuffll Implementation
//
// The All ▲lgorithms Project
//
// https://allalgorithms.com/
// https://github.com/allalgorithms/cpp
//
// Contributed by: shashank3395
// Github: @shashank3395
//
#include<iostream>
#include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin>>n;
if(n==1)
{ cout<<1<<"\n"<<1;}
else if(n%2==0)
{
for(int i=1;i<=n;i++)
cout<<i<<" ";
cout<<"\n";
for(int i=n;i>=1;i--)
cout<<i<<" ";
}
else if(n%2==1)
{
for(int i=1;i<=n;i++)
cout<<i<<" ";
cout<<"\n";
for(int i=n;i>=1;i--)
cout<<i<<" ";
}
}
