human
Friends Pairing Problem | Returns count of ways n people can remain single or paired up ..
Filling dp [ ] in bottom - up manner using recursive formula explained above ..
Driver code"
Solution in Python:
 ... Write me a code to friends Pairing Problem and the other steps required?
assistant
#Here is code to friends Pairing Problem and the other steps required.
 def countFriendsPairings ( n ) :
	dp = [ 0 for i in range ( n + 1 ) ]
	for i in range ( n + 1 ) :
		if ( i <= 2 ) :
			dp [ i ] = i
		else :
			dp [ i ] = dp [ i - 1 ] + ( i - 1 ) * dp [ i - 2 ]
	return dp [ n ]
n = 4
print ( countFriendsPairings ( n ) )