Explain if the input is 14 17 5 then how the answer is 3 and not 11.
step 1 - x_{0}=5 , n1=14-5 or 9 n2=17-5 or 12
step 2 - x_{1}=4 , n1=9-4 or 5 n2=12-4 or 8
step 3 - x_{2}=3 , n1=5-3 or 2 n2=8-3 or 5
step 4 - x_{3}=2 , n1=2-2 or 0 n2=5-2 or 3
therefore, n1+n2 = 3 
thanks buddy, I thought we have to start from 1âŚm