human
Give me a code to count numbers from a given range that can be visited moving any number of steps from the range [ L , R ] and the other steps required given the following:
Count numbers from a given range that can be visited moving any number of steps from the range [ L , R ] | Function to count points from the range [ X , Y ] that can be reached by moving by L or R steps.
Initialize difference array.
Initialize Count.
Marking starting point.
Iterating from X to Y.
Accumulate difference array.
If diff_arr [ i ] is greater than 1.
Updating difference array.
Visited point found.
Driver Code.
Given Input.
Function Call"
How can the above be solved in Python?
assistant
#Here is code to count numbers from a given range that can be visited moving any number of steps from the range [ L , R ] and the other steps required.
 def countReachablePoints ( X , Y , L , R ) :
	diff_arr = [ 0 for i in range ( 100000 ) ]
	count = 0
	diff_arr [ X ] = 1
	diff_arr [ X + 1 ] = - 1
	for i in range ( X , Y + 1 , 1 ) :
		diff_arr [ i ] += diff_arr [ i - 1 ]
		if ( diff_arr [ i ] >= 1 ) :
			diff_arr [ i + L ] += 1
			diff_arr [ i + R + 1 ] -= 1
			count += 1
	return count
if __name__ == ' _ _ main _ _ ' :
	X = 3
	Y = 12
	L = 2
	R = 3
	print ( countReachablePoints ( X , Y , L , R ) )