题目地址：http://ac.jobdu.com/problem.php?cid=1040&pid=87
另地址：http://acmclub.com/problem.php?id=1151
//九度OJ 教程88 递归解决之汉诺塔III//http://ac.jobdu.com/problem.php?cid=1040&pid=87#include<stdio.h>int main(){ long long n,i,s[36]; s[1]=2; for(i=2;i<36;i++)s[i]=3*s[i-1]+2; while(~scanf("%lld",&n))printf("%lld\n",s[n]); return 0;}