import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Integer[] mochi = new Integer[N];
		int ans = 1;
		
		for(int i =0; i< N; i++) {
			mochi[i] = sc.nextInt();
		}
		Arrays.sort(mochi,Comparator.reverseOrder());
		
		for(int i = 0; i < N; i++) {
			if(i != N - 1) {
				if(mochi[i] > mochi[i+1]) {
					ans++;
					}
				} 
		}
		System.out.println(ans);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz