/*
 * ????????.cpp
 *
 *  Created on: 2011-10-19
 *      Author: Administrator
 */
int main()
{
	int i,j,n;
	cin>>n;
	int a[n];
	cin>>a[0];
	cout<<a[0];
	for(i=1;i<n;i++)
	{
		cin>>a[i];
	    for(j=0;j<i;j++)
	    {
	    	if(a[i]==a[j])
	    		break;
	    	if(a[i]!=a[j]&&j==(i-1))
	    		cout<<" "<<a[i];
	    }
	}
	return 0;
}