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