#include <iostream>
using namespace std;

void NhapMang(int a[], int n);
void NhapMang(int a[], int n)
{
	for (int i = 1; i <= n; i++)
	{
		cout << "Phan tu thu " << i << " la :";
		cin >> a[i];
	}
}
int KiemTra(int m,int a[], int c[])
{
	for (int i = 1; i <= m; i++)
		if (m == c[i])
			return 1;
	return 0;
}
int DemPhanTu(int a[], int n,int c[],int m)
{
	int dem = 0;
	for (int j = 1; j < n;j++)
	{
		if (KiemTra(m,a, c) == 1)
			j++;
		else
		{
			for (int i = j + 1; i <= n; i++)
			{
				if (a[j] == a[i])
				{
					dem = dem + 1;
					m = a[j];
					break;
				}
			}
		}
	}
	cout << "So phan tu khac nhau co trong mang la :" << n - dem ;
	return 1;
}
int main()
{
	int n,m=1;
	int a[1000],c[1000];
	cout << "So phan tu cua mang la:";
	cin >> n;
	int dem = 0;
	NhapMang(a, n);
	DemPhanTu(a, n,c,m);
	return 1;
}