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Sorting/Slow Sort.cpp
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57
Sorting/Slow Sort.cpp
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//Returns the sorted vector after performing SlowSort
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//It is a sorting algorithm that is of humorous nature and not useful.
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//It's based on the principle of multiply and surrender, a tongue-in-cheek joke of divide and conquer.
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//It was published in 1986 by Andrei Broder and Jorge Stolfi in their paper Pessimal Algorithms and Simplexity Analysis.
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//This algorithm multiplies a single problem into multiple subproblems
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//It is interesting because it is provably the least efficient sorting algorithm that can be built asymptotically,
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//and with the restriction that such an algorithm, while being slow, must still all the time be working towards a result.
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#include<iostream>
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using namespace std;
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void SlowSort(int a[], int i, int j)
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{
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if(i>=j)
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return;
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int m=i+(j-i)/2; //midpoint, implemented this way to avoid overflow
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int temp;
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SlowSort(a, i, m);
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SlowSort(a, m + 1, j);
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if(a[j]<a[m])
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{
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temp=a[j]; //swapping a[j] & a[m]
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a[j]=a[m];
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a[m]=temp;
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}
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SlowSort(a, i, j - 1);
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}
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//Sample Main function
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int main()
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{
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int size;
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cout<<"\nEnter the number of elements : ";
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cin>>size;
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int arr[size];
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cout<<"\nEnter the unsorted elements : ";
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for (int i = 0; i < size; ++i)
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{
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cout<<"\n";
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cin>>arr[i];
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}
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SlowSort(arr, 0, size);
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cout<<"Sorted array\n";
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for (int i = 0; i < size; ++i)
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{
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cout << arr[i] << " ";
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}
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return 0;
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}
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