int main()
{
	int n,i1,i2,i3,flag=1;        /*i1????????????i2,i3???????????????????n??????*/
    int a[20000];
	scanf("%d",&n);
	for(i1=0;i1<n;i1++)
		scanf("%d",&a[i1]);
	printf("%d",a[0]);
	for(i2=1;i2<n;i2++)
	{
		flag=1;
		for(i3=0;i3<i2;i3++)
		{
			if(a[i2]==a[i3])
				flag*=0;
		}
	    if(flag==1)
			printf(" %d",a[i2]);
	}
	return 0;
}
