#include<iostream>
#include<iomanip>
#include<cmath>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>
#include<stack>
#include <typeinfo>  
using namespace std;
int main(void){
    int N, c; cin >> N;
    vector<int> v;
    int cnt = 0;
    for(int i = 0; i < N; i++){
        cin >> c;
        v.push_back(c);
    }
    int key = v[0];
    sort(v.begin(), v.end());
    for(int i = 1; i < N; i++){
        if(key != v[i]){
            cnt++;
            key = v[i];
        }
    }
    if(cnt > 0) cnt += 1;
    cout << cnt << endl;
    return 0;
}