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Given an array of positive integers. Find the length of the longest sub-sequence such that elements in the subsequence are consecutive integers, the** consecutive numbers can be in any order.**

**Example 1:**

**Input:
**N = 7
a[] = {2,6,1,9,4,5,3}
**Output:
**6**
Explanation:
**The consecutive numbers here
are 1, 2, 3, 4, 5, 6. These 6
numbers form the longest consecutive
subsquence.

**Example 2:**

**Input:
**N = 7
a[] = {1,9,3,10,4,20,2}
**Output:
**4**
Explanation:
**1, 2, 3, 4 is the longest
consecutive subsequence.

**Your Task:**

You don't need to read input or print anything. Your task is to complete the function **findLongestConseqSubseq()** which takes the array arr[] and the size of the array as inputs and returns the length of the longest subsequence of consecutive integers.

**Expected Time Complexity:** O(N).

**Expected Auxiliary Space:** O(N).

**Constraints:**

1 <= N <= 10^{5}

0 <= a[i] <= 10^{5}

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Longest consecutive subsequence

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