6259: Function
内存限制：128 MB
时间限制：1.000 S
评测方式：文本比较
命题人：
提交：1
解决：0
题目描述
Define a function f(n)=(f(n-1)+1)/f(n-2). You already got f(1) and f(2). Now, give you a number m, please find the value of f(m).
输入
There are several test cases. Each case contains three integers indicating f(1), f(2) and m ( 1 <= f(1), f(2), m <= 1000,000,000).
输出
For each case, please output the value of f(m), rounded to 6 decimal places.
样例输入 复制
1 1 3样例输出 复制
2.000000