human
Can you provide a code to final state of the string after modification and the other steps required given the following:
Final state of the string after modification | Function to return final positions of the boxes.
Populate forces going from left to right.
Populate forces going from right to left.
return final state of boxes.
Driver code.
Function call to print answer"
How can the above be solved in Python?
assistant
#Here is code to final state of the string after modification and the other steps required.
 def pushBoxes ( S ) :
	N = len ( S )
	force = [ 0 ] * N
	f = 0
	for i in range ( 0 , N ) :
		if S [ i ] == ' R ' :
			f = N
		elif S [ i ] == ' L ' :
			f = 0
		else :
			f = max ( f - 1 , 0 )
		force [ i ] += f
	f = 0
	for i in range ( N - 1 , - 1 , - 1 ) :
		if S [ i ] == ' L ' :
			f = N
		elif S [ i ] == ' R ' :
			f = 0
		else :
			f = max ( f - 1 , 0 )
		force [ i ] -= f
	return " " . join ( ' . ' if f == 0 else ' R ' if f > 0 else ' L ' for f in force )
S = " . L . R . . . LR . . L . . "
print ( pushBoxes ( S ) )