Cod sursa(job #2307675)

Utilizator mihailescu_eduardMihailescu Eduard-Florin mihailescu_eduard Data 25 decembrie 2018 13:38:41
Problema Sortare prin comparare Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.92 kb
#include <fstream>

using namespace std;

ifstream fin("algsort.in");
ofstream fout("algsort.out");

static const int NMAX = 5e5+5;

int n;
int v[NMAX];

int part(int arr[], int low, int high)
{
    int pivot = arr[high];

    int i = low -1;

    for(int j = low; j < high; ++j)
    {
        if(arr[j] <= pivot)
        {
            i++;
            swap(arr[i], arr[j]);
        }
    }
    swap(arr[high], arr[i+1]);
    return i+1;
}

void Quicksort(int arr[], int low, int high)
{
    if(low < high)
    {
        int pi = part(arr,low,high);

        Quicksort(arr,low, pi -1);
        Quicksort(arr, pi+1, high);
    }

}

void ReadInput()
{
    fin >> n;
    for(int i =1; i<= n;++i)
        fin >> v[i];
}
void PrintOutput()
{
    for(int i =1; i<= n;++i)
        fout << v[i] << " ";
}

int main()
{
    ReadInput();
    Quicksort(v,1,n);
    PrintOutput();
    return 0;
}