Pagini recente » Cod sursa (job #407095) | Cod sursa (job #1182108) | Cod sursa (job #1009805) | Cod sursa (job #432939) | Cod sursa (job #1321248)
#include <fstream>
#include <ctime>
#include <cstdlib>
#define maxn 500001
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int v[maxn],n;
//Partition2
void quicksort (int p, int q)
{
if (q<=p) return;
int x=rand()%(q-p+1)+p;
swap (v[x],v[p]);
int piv = p, i = p, j = q;
while (i < j)
{
while (j > piv && v[j] >= v[piv])
--j;
if (j > piv)
{
swap (v[piv],v[j]);
piv = j;
}
while (i < piv && v[i] <= v[piv])
++i;
if (i < piv)
{
swap (v[piv],v[i]);
piv = i;
}
}
quicksort (p,j-1);
quicksort (j+1,q);
}
int main()
{
fin>>n;
for (int i=1; i<=n; ++i) fin>>v[i];
srand (time(NULL));
quicksort (1,n);
for (int i=1; i<=n; ++i) fout<<v[i]<<" ";
}