PAT_1001（中文）

#include<stdio.h>

int main()
{
int n;
int step = 0;
scanf("%d", &n);
while( 1 != n )
{
if( (n%2) == 0 )
{
n = n / 2;
++step;
}
else
{
n = 3 * n + 1;
n = n / 2;
++step;
}
}
printf("%d\n", step);
return 0;
}