human
Total number of ways to place X and Y at n places such that no two X are together | Function to return number of ways.
for n = 1.
for n = 2.
iterate to find Fibonacci term.
total number of places"
Solution in Python:

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What is a code to total number of ways to place X and Y at n places such that no two X are together and the other steps required?
assistant
#Here is code to total number of ways to place X and Y at n places such that no two X are together and the other steps required.
 def ways ( n ) :
	first = 2 ;
	second = 3 ;
	res = 0 ;
	for i in range ( 3 , n + 1 ) :
		res = first + second ;
		first = second ;
		second = res ;
	return res ;
n = 7 ;
print ( " Total ▁ ways ▁ are : ▁ " , ways ( n ) ) ;