Gym - 101243B Hanoi tower【找规律】

题目链接：https://vjudge.net/problem/Gym-101243B
题意：也就是汉诺塔，给你n个盘子，和3根柱子，问你移动到第几步的时候是三个柱子上的盘子数量都相等的时候
解析：按照题目给你的那个程序把数据算出来，然后找规律即可（高精度）
按照题意翻译的程序：

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

using namespace std;
typedef long long ll;
const int maxn=1e5+100;
int t[maxn];
int k;
void hanoi(char a,char b,char c,int n)
{
    if(n<1)
        return ;
    hanoi(a,c,b,n-1);
    printf("------------->%d: %d %d %d\n",k++,--t[a-'a'],++t[b-'a'],t[c-'a']);
    hanoi(c,b,a,n-1);
}
int main()
{
    int n;
    scanf("%d",&n);
    k = 1;
    t[0] = n;
    hanoi('a','b','c',n);
    return 0;
}

AC代码

a = [0]*105;
a[1] = 2
a[2] = 9
deta = 97
for i in range(3,103):
    if i%2==1:
        a[i] = a[i-1]*4+2
    else:
        a[i] = a[i-1]+deta
        deta = 15*deta + deta-15
#print(a)
#n = int(int(input())/3)
In  = open("input.txt","r")
Out = open("output.txt","w")
n = int(int(In.read())/3)
Out.write(str(a[n]))
#print(a[n])