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Cod sursa(job #792464)
#include <fstream>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
long a[500001];
int poz(int st, int dr)
{
int i=st, j=dr,di=0,dj=1,aux;
while(i<j)
{
if(a[i]>a[j])
{
aux=a[i];
a[i]=a[j];
a[j]=aux;
di=1-di;
dj=1-dj;
}
i+=di;
j-=dj;
}
return j;
}
void qs(int st, int dr)
{
if(st<dr)
{
int p = poz(st,dr);
qs(st,p-1);
qs(p+1,dr);
}
}
int main()
{
int n;
fin>>n;
for(int i=1;i<=n;i++)
fin>>a[i];
qs(1,n);
for(int i=1;i<=n;i++)
fout<<a[i]<<' ';
fin.close();
fout.close();
return 0;
}