#include <iostream>
using namespace std;
int main(){
    int a;
    cin>>a;
    if (a==3){
        a++;
    }else if(a==5){
        a--;
    }else{
        cout<<0<<endl;
    }
    cout<<a;
}

#include <iostream>
using namespace std;
int main(){
    int a;
    cin>>a;
    switch (a){
        case 3:
            a++;
            break;
        case 5:
            a--;
            break;
        default:
            cout<<0<<endl;
            break;
    }
    cout<<a<<endl;
}