xxx定律

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 int main()
 4 {
 5     int n;
 6     int ans;
 7     while(cin>>n&&n)
 8     {
 9         ans=0;
10         if(n==1)ans=0;
11         else
12         {
13         while(n>1)
14         {
15               if(n%2==0)
16               {
17                 n/=2;
18                 ans++;
19               }
20               else
21               {
22                   n=n*3+1;
23                   n/=2;
24                   ans++;
25               }
26         }
27         }
28         cout<<ans<<endl;
29     }
30     return 0;
31 }