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Cod sursa(job #590785)
#include<fstream>
#define infile "algsort.in"
#define outfile "algsort.out"
#define n_max 500005
using namespace std;
void citeste();
void afiseaza();
int a[n_max];
int n;
void citeste()
{
ifstream fin(infile);
fin>>n;
for(int i=1;i<=n;i++)
fin>>a[i];
fin.close();
}
void quick(int p, int q)
{
int m,st=p,dr=q,x=a[p];
while(st<dr)
{
while(st<dr && a[dr]>=x) dr--;
a[st]=a[dr];
while(st<dr && a[st]<=x) st++;
a[dr]=a[st];
}
a[st]=x;
m=st;
if(m-1>p) quick(p,m-1);
if(m+1<q) quick(m+1,q);
}
void afiseaza()
{
ofstream fout(outfile);
for(int i=1;i<=n;i++)
fout<<a[i]<<" ";
fout.close();
}
int main()
{
citeste();
quick(1,n);
afiseaza();
return 0;
}