Cod sursa(job #3196523)

Utilizator rapidu36Victor Manz rapidu36 Data 24 ianuarie 2024 10:36:14
Problema Sortare prin comparare Scor 80
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.92 kb
#include <fstream>
#include <cstdlib>

using namespace std;

const int N = 5e5;

int v[N];

int partitie(int v[], int st, int dr)
{
    int poz_rand = rand() % (dr - st + 1) + st;
    swap(v[dr], v[poz_rand]);
    int poz_piv = st;
    for (int i = st; i < dr; i++)
    {
        if (v[i] < v[dr])
        {
            swap(v[i], v[poz_piv++]);
        }
    }
    swap(v[dr], v[poz_piv]);
    return poz_piv;
}

void qs(int v[], int st, int dr)
{
    if (st >= dr)
    {
        return;
    }
    int p = partitie(v, st, dr);
    qs(v, st, p - 1);
    qs(v, p + 1, dr);
}

int main()
{
    ifstream in("algsort.in");
    ofstream out("algsort.out");
    int n;
    in >> n;
    for (int i = 0; i < n; i++)
    {
        in >> v[i];
    }
    qs(v, 0, n - 1);
    for (int i = 0; i < n; i++)
    {
        out << v[i] << " ";
    }
    in.close();
    out.close();
    return 0;
}