21:角谷猜想

5

5*3+1=16
16/2=8
8/2=4
4/2=2
2/2=1
End

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<cstring>
 4 using namespace std;
 5 int ans[10001];
 6 double tot=0;
 7 int main()
 8 {
 9     long long int n;
10     cin>>n;
11     while(n!=1)
12     {
13         if(n%2==1)
14         {
15             cout<<n<<"*3+1="<<n*3+1<<endl;
16             n=n*3+1;
17         }
18         else if(n%2==0)
19         {
20             cout<<n<<"/2="<<n/2<<endl;
21             n=n/2;
22         }
23     }
24     cout<<"End";
25     return 0;
26 }