P18085 [GeeksforGeeks] Number of digits2559
普及-
题目描述

Given a number N, find the number of digits in the Nth Fibonacci Number.

Example 1:
Input:
N = 5
Output:
1
Explanation:
5th fibonacci number is 5
which contains only one digit
Example 2:
Input:
N = 12
Output:
3
Explanation:
12th fibonacci number is 144
which contains three digits
Your Task:
You don't need to read input or print anything. Your task is to complete the function noOfDigits() which takes an integer N as input parameters and returns an integer, number of digits in Nth Fibonacci number

Expected Time Complexity: O(1)
Expected Space Complexity: O(1)

Constraints:
1 <= N <= 10^{3}

输入格式

见题面

输出格式

见题面

样例输入
N = 5
样例输出
1