#include
#include
void main()
{
int n, p, ts = 0;
scanf("%d", &n);
while ((n != 1)&&(n<=1000))
{
if ((n % 2) == 0)
{
p = n / 2;
n = p;
}
else
{
p = (3 * n + 1) / 2;
n = p;
}
ts = ts + 1;
}
printf("总共用了'%d'次", ts);
}