/*
 * print different numbers.cpp
 *
 *  Created on: 2013-10-28
 *      Author: kongwei
 */
int main()
{
	int n;
	cin>>n;
	int array[n];//????
	for(int i=0;i<=n-1;i++)//????
		cin>>array[i];
	cout<<array[0];//???array[0]
	for(int i=1;i<=n-1;i++)//??????????
	{
		int g=0;//?????g,?????0
		for(int j=0;j<=i-1;j++)//???????????????????????
			if(array[i]==array[j])
				g=g+1;
		if(g==0)
			cout<<" "<<array[i];
	}
	return 0;
}