#include <bits/stdc++.h>
using namespace std;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    unsigned n,c{};
    cin >> n;
    if(1==n){cout<<1<<endl;return 0;}
    vector<unsigned> v(n);
    for(auto&& e : v)
        cin >> e;
    
    sort(v.begin(),v.end());
    
    if(v[0]!=v[1]) c++;
    if(v[n-2]!=v[n-1]) c++;
    if(n<3) goto PRINT;
    for(auto&& i1=v.begin(),i2=v.begin()+1,i3=v.begin()+2;i3!=v.end();++i1,++i2,++i3)
        if(*i1 != *i2 && *i2 != *i3) c++;
PRINT:
    cout << c << endl;
}