#include
#include
#include
#include
using namespace std;
int num[1000010];
int main()
{
int n;
scanf("%d",&n);
for(int i=1;i<=n;++i)
scanf("%d",&num[i]);
sort(num+1,num+n+1);
n=unique(num+1,num+n+1)-num-1;
for(int i=1;i<=n;++i)
printf("%d ",num[i]);
}