human
Largest number M less than N such that XOR of M and N is even | Function to find the maximum possible value of M.
Edge case.
M = N - 2 is maximum possible value.
Driver code"
Solution in Python:
assistant
#Here is code to largest number M less than N such that XOR of M and N is even and the other steps required.
 def getM ( n ) :
	if ( n == 1 ) :
		return - 1 ;
	else :
		return n - 2 ;
n = 10
print ( getM ( n ) )