问题3232--Lucky Coins Sequence

3232: Lucky Coins Sequence

[命题人 : ]
时间限制 : 1.000 sec  内存限制 : 32 MB

题目描述

As we all know,every coin has two sides,with one side facing up and another side facing down.Now,We consider two coins's state is same if they both facing up or down.If we have N coins and put them in a line,all of us know that it will be 2^N different ways.We call a "N coins sequence" as a Lucky Coins Sequence only if there exists more than two continuous coins's state are same.How many different Lucky Coins Sequences exist?

输入

There will be sevaral test cases.For each test case,the first line is only a positive integer n,which means n coins put in a line.Also,n not exceed 10^9.

输出

You should output the ways of lucky coins sequences exist with n coins ,but the answer will be very large,so you just output the answer module 10007.

样例输入 Copy

3
4

样例输出 Copy

2
6

来源/分类

muti