#include <stdio.h>
int main(int argc, char const *argv[])
{
int n;
int cnt = 0;
scanf("%d", &n);
while(n!=1){
if(n%2==0){
n/=2;
cnt++;
}
else{
n=(3*n+1)/2;
cnt++;
}
}
printf("%d", cnt);
return 0;
}
int main(int argc, char const *argv[])
{
int n;
int cnt = 0;
scanf("%d", &n);
while(n!=1){
if(n%2==0){
n/=2;
cnt++;
}
else{
n=(3*n+1)/2;
cnt++;
}
}
printf("%d", cnt);
return 0;
}