human
Minimum array elements to be changed to make Recaman 's sequence | Python3 implementation of the approach.
First term of the sequence is always 0.
Fill remaining terms using recursive formula.
If arr [ i - 1 ] - i is negative or already exists.
Function that returns minimum changes required.
Set to store first n Recaman numbers.
Generate and store first n Recaman numbers.
Insert first n Recaman numbers to set.
If current element of the array is present in the set.
Return the remaining number of elements in the set.
Driver code"
How can the above be solved in Python?
 Can you provide a code to minimum array elements to be changed to make Recaman 's sequence and the other steps required?
assistant
#Here is code to minimum array elements to be changed to make Recaman 's sequence and the other steps required.
 def recamanGenerator ( arr , n ) :
	arr [ 0 ] = 0
	for i in range ( 1 , n ) :
		temp = arr [ i - 1 ] - i
		j = 0
		for j in range ( i ) :
			if ( ( arr [ j ] == temp ) or temp < 0 ) :
				temp = arr [ i - 1 ] + i
				break
		arr [ i ] = temp
def recamanArray ( arr , n ) :
	s = dict ( )
	recaman = [ 0 for i in range ( n ) ]
	recamanGenerator ( recaman , n )
	for i in range ( n ) :
		s [ recaman [ i ] ] = s . get ( recaman [ i ] , 0 ) + 1
	for i in range ( n ) :
		if arr [ i ] in s . keys ( ) :
			del s [ arr [ i ] ]
	return len ( s )
arr = [ 7 , 11 , 20 , 4 , 2 , 1 , 8 , 6 ]
n = len ( arr )
print ( recamanArray ( arr , n ) )