Cod sursa(job #2737033)

Utilizator moise_alexandruMoise Alexandru moise_alexandru Data 4 aprilie 2021 12:40:42
Problema Sortare prin comparare Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.78 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int maxn = 500005;
int v[maxn];

int pivot(int st, int dr)
{
    int pivot = v[dr];
    int x = st;
    for(int i = st; i <= dr; i++)
    {
        if(v[i] < pivot)
        {
            swap(v[i], v[x]);
            x++;
        }
    }
    swap(v[x], v[dr]);
    return x;
}

void quicksort(int st, int dr)
{
    if(st >= dr)
        return;
    int p = pivot(st, dr);
    quicksort(st, p - 1);
    quicksort(p + 1, dr);
}

int main()
{
    int n;
    in >> n;
    for(int i = 1; i <= n; i++)
        in >> v[i];
    quicksort(1, n);
    for(int i = 1; i <= n; i++)
        out << v[i] << " ";
    out << "\n";
    return 0;
}