#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    cin >> n;
    vector<int> m(n);
    for(int m_i = 0; m_i < n; m_i++){
       cin >> m[m_i];
    }
    if(n==1)
        {
        cout<<"0"<<endl;
    }
    else if(n==2)
        {
        cout<<(n-1)<<endl;
    }
    else
        {
        cout<<(n+1)<<endl;
    }
    // your code goes here
    return 0;
}