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Cod sursa(job #392706)
#include <stdio.h>
#include <algorithm>
#define N 500001
/*sortarea elementelor cu pointeri, mutarea cheilor la
sfarsit in place; probabil eficient cand elementele
sunt mari si dureaza copierea
*/
using namespace std;
int sir[N],p[N];
bool viz[N];
int comp(int x,int y)
{if(sir[x]<sir[y])
return true;
return false;
}
int main ()
{freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
int i,j,n,aux;
scanf("%d",&n);
for (i=0;i<n;i++)
{scanf("%d",&sir[i]);
p[i]=i;
}
sort(p,p+n,comp);
for (i=0;i<n;i++)
{if(viz[i]==false)
{viz[i]=true;
if(p[i]!=i)
{aux=sir[i];
j=i;
while(p[j]!=i)
{viz[j]=true;
sir[j]=sir[p[j]];
j=p[j];
}
sir[j]=aux;
viz[j]=true;
}
}
}
for (i=0;i<n;i++)
{printf("%d ",sir[i]);
}
return 0;
}