int main(){
	int a[101],b[20000],n,i;  //????a????10?100?????????
	for(i=0;i<101;i=i+1){
		a[i]=0;
	}  //??????0?
	cin>>n;
	cin>>b[0];
	cout<<b[0];  //????????????????
	a[b[0]]=1;   //???a???1??????
	for(i=1;i<n;i++){
		cin>>b[i];
		if(a[b[i]]==0){
			cout<<" "<<b[i];
			a[b[i]]=1;
		}
	}//???????
	return 0;
}//?????