2070 Fibbonacci Number

关键字: 代码分享 杭电100题

问题描述

Problem Description

Your objective for this question is to develop a program which will generate a fibbonacci number. The fibbonacci function is defined as such:

f(0) = 0
f(1) = 1
f(n) = f(n-1) + f(n-2)

Your program should be able to handle values of n in the range 0 to 50.

Input

Each test case consists of one integer n in a single line where 0≤n≤50. The input is terminated by -1.

Output

Print out the answer in a single line for each test case.

Sample Input

3
4
5
-1

Sample Output

2
3
5

问题分析

公式都有了,还等什么?直接AC掉它!

参考源码

redraiment使用Emacs Lisp批量迁移《HDU 2070-2079》