import java.util.*;

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

/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