#include <iostream>
using namespace std;
int main() {
	int n, a[100], b[100];
	cout << "Nhap so phan tu co trong mang a: ";
	cin >> n;
	int temp = 0, dem = 0;
	for (int i = 0; i < n; i++) {
		cout << "Nhap so thu " << i + 1 << " trong mang: ";
		cin >> a[i];
	}
	//Tim phan tu trung mang a roi gan qua mang b
	for (int i = 0; i < n - 1; i++) {
		for (int j = i + 1; j < n; j++) {
			int dem = 0;
			if (a[i] == a[j]) {
	//Gia su mang a co lon hon 3 phan tu trung nhau => xet mang b
	//Neu mang b co phan tu da chon truoc do thi loai no
				for (int k = 0; k < temp; k++) {
					if (a[i] == b[k]) {
						dem++;
					}
				}
				if (dem == 0) {
					b[temp] = a[i];
					temp++;
				}
			}
		}
	}
	//Xet mang b la cac phan tu trung nhau voi mang a
	//Neu mang a co phan tu khong trung voi mang b => gan so do vao b
	int z = temp;
	for (int i = 0; i < n; i++) {
		int dem = 0;
		for (int j = 0; j < temp; j++) {
			if (a[i] != b[j]) {
				dem++;
			}
			if (dem == temp) {
				b[z] = a[i];
				z++;
			}
		}
	}
	//Xuat mang b
	for (int i = 0; i < z; i++) {
		cout << b[i] << "\t";
	}
}