题目描述
You are given an integer, $N$. Write a program to determine if $N$ is an element of the Fibonacci sequence.
The first few elements of the Fibonacci sequence are $0,1,1,2,3,5,8,13,\cdots$. A Fibonacci sequence is one where every element is a sum of the previous two elements in the sequence. The first two elements are ${0}$ and ${1}$.
Formally:
$\begin{aligned}&\textit{fib}_0=0\\ &\textit{fib}_1=1\\ &\vdots\\ &\textit{fib}_n=fib_{n-1}+fib_{n-2}\forall n>1\end{aligned}$
Function Description
Complete the isFibo function in the editor below.
isFibo has the following parameters:
- int n: the number to check
Returns
- string: either IsFibo or IsNotFibo
Input Format
The first line contains ${t}}$, number of test cases.
${t}}$ lines follow. Each line contains an integer $n$.
Constraints
$1\leq t\leq10^5$
$1\leq n\leq10^{10}$
Sample Input
STDIN Function
----- --------
3 t = 3
5 n = 5
7 n = 7
8 n = 8
Sample Output
IsFibo
IsNotFibo
IsFibo
Explanation
$5$ is a Fibonacci number given by ${fib}_5=3+2$
$7$ is not a Fibonacci number
$8$ is a Fibonacci number given by ${fib}_6=5+3$
Time Limit
The time limit for this challenge is given here.
输入格式
见题面
输出格式
见题面