import java.util.*;
import java.util.Collections;
import java.util.ArrayList;

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

        int N = sc.nextInt();
        int[] d = new int[N];
        int sum = 1;

        for(int i=0; i<N; i++){
            d[i] = sc.nextInt();
            if(i>0){
                for(int j=0; j<i; j++){
                    if(d[i]==d[j]){
                        break;
                    }
                    if(j==i-1){
                        sum += 1;
                    }
                }
            }
        }
        System.out.println(sum);
    } 
}
/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