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

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