问题 1080 --Fibonacci Numbers

1080: Fibonacci Numbers

时间限制: 1 Sec  内存限制: 128 MB
提交: 2  解决: 2
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题目描述

A Fibonacci sequence is calculated by adding the previous two members of the sequence, with
the first two members being both 1.
f (1) = 1, f (2) = 1, f (n > 2) = f (n − 1) + f (n − 2)
Your task is to take a number as input, and print that fibonacci number.

输入

100

输出

354224848179261915075

样例输入

100

样例输出

354224848179261915075

提示


No generated fibonacci number in excess of 1000 digits will be in the test data, i.e. f (20) = 6765

has 4 digits.

来源

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