human
Maximum items that can be bought from the cost Array based on given conditions | Function to find the maximum number of items that can be bought from the given cost array.
Sort the given array.
Variables to store the prefix sum , answer and the counter variables.
Initializing the first element of the prefix array.
If we can buy at least one item.
Iterating through the first K items and finding the prefix sum.
Check the number of items that can be bought.
Finding the prefix sum for the remaining elements.
Check the number of iteams that can be bought.
Driver code"
How can the above be solved in Python?
 Can you provide a code to maximum items that can be bought from the cost Array based on given conditions and the other steps required?
assistant
#Here is code to maximum items that can be bought from the cost Array based on given conditions and the other steps required.
 def number ( a , n , p , k ) :
	a . sort ( )
	pre = [ ]
	for i in range ( n ) :
		pre . append ( 0 )
	ans = 0
	val = 0
	i = 0
	j = 0
	pre [ 0 ] = a [ 0 ]
	if pre [ 0 ] <= p :
		ans = 1
	for i in range ( 1 , k - 1 ) :
		pre [ i ] = pre [ i - 1 ] + a [ i ]
		if pre [ i ] <= p :
			ans = i + 1
	pre [ k - 1 ] = a [ k - 1 ]
	for i in range ( k - 1 , n ) :
		if i >= k :
			pre [ i ] += pre [ i - k ] + a [ i ]
		if pre [ i ] <= p :
			ans = i + 1
	return ans
n = 5
arr = [ 2 , 4 , 3 , 5 , 7 ]
p = 11
k = 2
print ( number ( arr , n , p , k ) )