import java.util.*;
public class uva11150 {
public static void main(String [] args) {
Scanner scn = new Scanner(System.in);
while(scn.hasNextInt()) {
int n = scn.nextInt();
int t = n;
int a = 0;
if(n%3!=0) {
n = n+1;
while(n >= 3) {
a = n%3;
n = (n-a)/3;
t += n;
n += a;
}
}
else if(n%3==0 && n%2==0) {
while(n >= 3) {
a = n%3;
n = (n-a)/3;
t += n;
n += a;
}
t += 1;
}
else {
while(n >= 3) {
a = n%3;
n = (n-a)/3;
t += n;
n += a;
}
}
System.out.println(t);
}
}
}