import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int count = 1;
        int n = Integer.parseInt(sc.nextLine());
        Integer d[] = new Integer[n];

        int i = 0;
        while (sc.hasNext()) {
            int val = Integer.parseInt(sc.nextLine());
            d[i] = val;
            i++;
        }
        Arrays.sort(d, Comparator.reverseOrder());

        int nowSize = d[0];
        for (Integer size : d) {
            if (size < nowSize) {
                nowSize = size;
                count++;
            }
        }

        System.out.println(count);
    }
}
/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