human
Count of subsets of integers from 1 to N having no adjacent elements | Function to count subsets.
Driver Code"
How can the above be solved in Python?

Can you provide a code to count of subsets of integers from 1 to N having no adjacent elements and the other steps required?
assistant
#Here is code to count of subsets of integers from 1 to N having no adjacent elements and the other steps required.
 def countSubsets ( N ) :
	if ( N <= 2 ) :
		return N
	if ( N == 3 ) :
		return 2
	DP = [ 0 ] * ( N + 1 )
	DP [ 0 ] = 0
	DP [ 1 ] = 1
	DP [ 2 ] = 2
	DP [ 3 ] = 2
	for i in range ( 4 , N + 1 ) :
		DP [ i ] = DP [ i - 2 ] + DP [ i - 3 ]
	return DP [ N ]
if __name__ == ' _ _ main _ _ ' :
	N = 20
	print ( countSubsets ( N ) )