Cod sursa(job #2897330)

Utilizator moise_alexandruMoise Alexandru moise_alexandru Data 3 mai 2022 14:51:31
Problema Sortare prin comparare Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.9 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("algsort.in");
ofstream out("algsort.out");
const int maxn = 500005;
int v[maxn];

void quicksort(int st, int dr)
{
    if(st >= dr)
        return;
    int pivot = v[(st + dr) / 2];
    int poz1 = st;
    int poz2 = dr;
    while(poz1 <= poz2)
    {
        while(v[poz1] < pivot && poz1 <= poz2)
            poz1++;
        while(v[poz2] > pivot && poz1 <= poz2)
            poz2--;
        if(v[poz1] >= pivot && v[poz2] <= pivot && poz1 <= poz2)
        {
            swap(v[poz1], v[poz2]);
            poz1++;
            poz2--;
        }
    }
    quicksort(st, poz2);
    quicksort(poz1, 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;
}