/**
* ???1000012847
* ??????
* ???????????
* ?????n????n???????????????10-100??? 
* ???????????????????????????????????????????
*/

int main()
{
	//??n????????a[20000]????????i?num??????count[20000]????????
	int n , a[20000] ,i , num , count[20000] = {0};

	cin >> n;                   //??????????n

	for (i = 0; i < n; i ++)      
	{
		cin >> a[i];             //????n??
		num = a[i];              //?num??a[i]
		count[num] ++;           //num???1
		
		if (i == 0)               //???????????
			cout << a[i];
		else                     //????????
		{
			if (count[num] == 1)      //??num???1????num                    
				cout << " " << num;
		}		
	}

	cout << endl;                 //??????
	return 0;
}
