[acm]HDOJ 2064 汉诺塔III

 1 //汉诺塔变种，只能从中间转移
 2 //11485816    2014-08-19 08:44:47    Accepted    2064    0MS    368K    307 B    G++    空信高手
 3 #include<iostream>
 4 #include<cstdio>
 5 using namespace std;
 6 #define LL long long 
 7 int main()
 8 {
 9     //freopen("input.txt","r",stdin);
10     LL Sum[35];
11     int n=0;
12     Sum[0] = 0;
13     Sum[1] = 2;
14     for(int i=2;i<=35;i++)
15     {
16         Sum[i]=3*Sum[i-1]+2;
17     }
18     while(cin>>n)
19         cout<<Sum[n]<<endl;
20     return 1;
21     
22 }