human
Maximize sum of given array by rearranging array such that the difference between adjacent elements is atmost 1 | Function to find maximum possible sum after changing the array elements as per the given constraints.
Stores the frequency of elements in given array.
Update frequency.
stores the previously selected integer.
Stores the maximum possible sum.
Traverse over array count [ ].
Run loop for each k.
Update ans.
Return maximum possible sum.
Driver Code.
Given array arr [ ].
Size of array.
Function Call"
How can the above be solved in Python?

What is a code to maximize sum of given array by rearranging array such that the difference between adjacent elements is atmost 1 and the other steps required?
assistant
#Here is code to maximize sum of given array by rearranging array such that the difference between adjacent elements is atmost 1 and the other steps required.
 def maxSum ( a , n ) :
	count = [ 0 ] * ( n + 1 )
	for i in range ( 0 , n ) :
		count [ min ( a [ i ] , n ) ] += 1
	size = 0
	ans = 0
	for k in range ( 1 , n + 1 ) :
		while ( count [ k ] > 0 and size < k ) :
			size += 1
			ans += size
			count [ k ] -= 1
		ans += k * count [ k ]
	return ans
if __name__ == ' _ _ main _ _ ' :
	arr = [ 3 , 5 , 1 ]
	n = len ( arr )
	print ( maxSum ( arr , n ) )