Solve the programming task below in a Python markdown code block.
Given an array of integers, find the longest subarray where the absolute difference between any two elements is less than or equal to $\mbox{1}$.  

Example  

$a=[1,1,2,2,4,4,5,5,5]$  

There are two subarrays meeting the criterion: $[1,1,2,2]$ and $[4,4,5,5,5]$.  The maximum length subarray has $5$ elements.

Function Description  

Complete the pickingNumbers function in the editor below.  

pickingNumbers has the following parameter(s):  

int a[n]: an array of integers  

Returns  

int:  the length of the longest subarray that meets the criterion  

Input Format

The first line contains a single integer $n$, the size of the array $\boldsymbol{a}$. 

The second line contains $n$ space-separated integers, each an $a[i]$.

Constraints

$2\leq n\leq100$
$0<a[i]<100$
The answer will be $\geq2$. 

Sample Input 0
6
4 6 5 3 3 1

Sample Output 0
3

Explanation 0

We choose the following multiset of integers from the array: $\{4,3,3\}$. Each pair in the multiset has an absolute difference $\leq1$ (i.e., $|4-3|=1$ and $|3-3|=0$), so we print the number of chosen integers, $3$, as our answer.

Sample Input 1
6
1 2 2 3 1 2

Sample Output 1
5

Explanation 1

We choose the following multiset of integers from the array: $\{1,2,2,1,2\}$.  Each pair in the multiset has an absolute difference $\leq1$ (i.e., $|1-2|=1$, $|1-1|=0$, and $|2-2|=0$), so we print the number of chosen integers, $5$, as our answer.