*******REXY PARKING RATE******* First 2 Hours: RM 5.00 Office Hour Rate (8 am – 5 pm): RM 4 per hour After Office Hour Rate (6 pm – 8 am): RM 7 per hour Saturday, Sunday, Public Holiday: RM 5 per hour (Flat Rate) 30% Discount (10 pm to 2 am) - ELIGIBLE FOR CAR THAT PARK MORE THAN 3 HOURS / FOR 5 HOURS AND MORE (SATURDAY, SUNDAY, AND PUBLIC HOLIDAY NOT APPLICABLE) PLUS 30% DISCOUNT WHEN CUSTOMER PARK FOR 5 DAYS AND MORE (ELIGIBLE FROM MONDAY TO SUNDAY)

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

int main(){
    int n;
    cin>>n;
    int hours, rate;
    if(n<=2){
        cout<<(n * 5);
    }
    else{
        hours = n - 2;
        if(n>=5){
            rate = 4;
        }
        else{
            rate = 7;
        }
        cout<<(hours * rate) + 10;
    }
    return 0;
}