Length of longest subsequence of Fibonacci Numbers in an Array
Given an array arr containing non-negative integers, the task is to print the length of the longest subsequence of Fibonacci numbers in this array.Examples: Input: arr[] = { 3, 4, 11, 2, 9, 21 } Output: 3 Here, the subsequence is {3, 2, 21} and hence the answer is 3.Input: arr[] = { 6, 4, 10, 13, 9,