import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} import java.util.Arrays; Arrays java.util import java.util.Collections; Collections java.util import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc Integer d[] = new Integer[N]; d new Integer[N] N for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		} int i = 0; int i = 0; i 0 i < N i N i++ i++ i {
			d[i] = sc.nextInt();
		} {
			d[i] = sc.nextInt();
		} d[i] = sc.nextInt() d[i] d i sc.nextInt() sc.nextInt sc sc.close() sc.close sc Arrays.sort(d, Collections.reverseOrder()) Arrays.sort Arrays d Collections.reverseOrder() Collections.reverseOrder Collections int ans = 1; ans 1 for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		} int i = 0; int i = 0; i 0 i < N-1 i N-1 N 1 i++ i++ i {
			if (d[i] > d[i+1]) {
				ans++;
			}
		} {
			if (d[i] > d[i+1]) {
				ans++;
			}
		} if (d[i] > d[i+1]) {
				ans++;
			} d[i] > d[i+1] d[i] d i d[i+1] d i+1 i 1 {
				ans++;
			} ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer d[] = new Integer[N];

		for (int i = 0; i < N; i++) {
			d[i] = sc.nextInt();
		}

		sc.close();
		Arrays.sort(d, Collections.reverseOrder());

		int ans = 1;
		for (int i = 0; i < N-1; i++) {
			if (d[i] > d[i+1]) {
				ans++;
			}
		}
		System.out.println(ans);
	}
}
