human
Number of trees whose sum of degrees of all the vertices is L | Iterative Function to calculate ( x ^ y ) in O ( log y ).
Initialize result.
If y is odd , multiply x with result.
y must be even now y = y / 2.
Function to return the count of required trees.
number of nodes.
Return the result.
Driver code"
How can the above be solved in Python?
assistant
#Here is code to number of trees whose sum of degrees of all the vertices is L and the other steps required.
 def power ( x , y ) :
	res = 1 ;
	while ( y > 0 ) :
		if ( y % 2 == 1 ) :
			res = ( res * x ) ;
		y = int ( y ) >> 1 ;
		x = ( x * x ) ;
	return res ;
def solve ( L ) :
	n = L / 2 + 1 ;
	ans = power ( n , n - 2 ) ;
	return int ( ans ) ;
L = 6 ;
print ( solve ( L ) ) ;