1259 : Fibbonacci Number

时间限制:1 Sec 内存限制:128 MiB
提交:80 答案正确:33

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题目描述

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.

输入

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

输出

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

样例输入

复制
3
4
5
-1

样例输出

复制
2
3
5

提示


			

来源

浙江工业大学网络选拔赛