#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define cpy(a,b) copy(begin(a),end(a),begin(b))
#define ld long double
#define dot(x) fixed<<setprecision(x)
#define foru(a,b,c) for(ll a=b;a<=c;a++)

ll n,a[100005];

int main(){
    freopen("arrayy.in","r",stdin);
    freopen("arrayy.out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(NULL);cout.tie(NULL);
    cin>>n;
    foru(i,1,n){
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    ll cnt=1;
    foru(i,2,n){
        if(a[i]!=a[i-1]){
            cnt++;
        }
    }
    if(a[1]==1){
        cout<<0;
        return 0;
    }
    cout<<cnt-1;
    return 0;
}