human
Give me a code to find sum of all nodes of the given perfect binary tree and the other steps required given the following:
Find sum of all nodes of the given perfect binary tree | function to find Sum of all of the nodes of given perfect binary tree.
no of leaf nodes.
list of vector to store nodes of all of the levels.
store the nodes of last level i . e . , the leaf nodes.
store nodes of rest of the level by moving in bottom - up manner.
loop to calculate values of parent nodes from the children nodes of lower level.
store the value of parent node as Sum of children nodes.
traverse the list of vector and calculate the Sum.
Driver Code"
How can the above be solved in Python?
assistant
#Here is code to find sum of all nodes of the given perfect binary tree and the other steps required.
 def SumNodes ( l ) :
	leafNodeCount = pow ( 2 , l - 1 )
	vec = [ [ ] for i in range ( l ) ]
	for i in range ( 1 , leafNodeCount + 1 ) :
		vec [ l - 1 ] . append ( i )
	for i in range ( l - 2 , - 1 , - 1 ) :
		k = 0
		while ( k < len ( vec [ i + 1 ] ) - 1 ) :
			vec [ i ] . append ( vec [ i + 1 ] [ k ] + vec [ i + 1 ] [ k + 1 ] )
			k += 2
	Sum = 0
	for i in range ( l ) :
		for j in range ( len ( vec [ i ] ) ) :
			Sum += vec [ i ] [ j ]
	return Sum
if __name__ == ' _ _ main _ _ ' :
	l = 3
	print ( SumNodes ( l ) )