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Binary Indexed Tree : Range Updates and Point Queries | Updates a node in Binary Index Tree ( BITree ) at given index in BITree . The given value ' val ' is added to BITree [ i ] and all of its ancestors in tree ..
index in BITree [ ] is 1 more than the index in arr [ ].
Traverse all ancestors and add 'val  .
Add ' val ' to current node of BI Tree.
Update index to that of parent in update View.
Constructs and returns a Binary Indexed Tree for given array of size n ..
Create and initialize BITree [ ] as 0.
Store the actual values in BITree [ ] using update ( ).
SERVES THE PURPOSE OF getElement ( ) Returns sum of arr [ 0. . index ] . This function assumes that the array is preprocessed and partial sums of array elements are stored in BITree [ ].
Iniialize result.
index in BITree [ ] is 1 more than the index in arr [ ].
Traverse ancestors of BITree [ index ].
Add current element of BITree to sum.
Move index to parent node in getSum View.
Return the sum.
Updates such that getElement ( ) gets an increased value when queried from l to r ..
Increase value at ' l ' by 'val  .
Decrease value at ' r + 1' by 'val  .
Driver code.
Add 2 to all the element from [ 2 , 4 ].
Find the element at Index 4.
Add 2 to all the element from [ 0 , 3 ].
Find the element at Index 3"
Solution in Python:
 ... Write me a code to binary Indexed Tree : Range Updates and Point Queries and the other steps required?
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#Here is code to binary Indexed Tree : Range Updates and Point Queries and the other steps required.
 def updateBIT ( BITree , n , index , val ) :
	index = index + 1
	while ( index <= n ) :
		BITree [ index ] += val
		index += index & ( - index )
def constructBITree ( arr , n ) :
	BITree = [ 0 ] * ( n + 1 )
	for i in range ( n ) :
		updateBIT ( BITree , n , i , arr [ i ] )
	return BITree
def getSum ( BITree , index ) :
	sum = 0
	index = index + 1
	while ( index > 0 ) :
		sum += BITree [ index ]
		index -= index & ( - index )
	return sum
def update ( BITree , l , r , n , val ) :
	updateBIT ( BITree , n , l , val )
	updateBIT ( BITree , n , r + 1 , - val )
arr = [ 0 , 0 , 0 , 0 , 0 ]
n = len ( arr )
BITree = constructBITree ( arr , n )
l = 2
r = 4
val = 2
update ( BITree , l , r , n , val )
index = 4
print ( " Element ▁ at ▁ index " , index , " is " , getSum ( BITree , index ) )
l = 0
r = 3
val = 4
update ( BITree , l , r , n , val )
index = 3
print ( " Element ▁ at ▁ index " , index , " is " , getSum ( BITree , index ) )