Solve the programming task below in a Python markdown code block.
Read problems statements in Mandarin Chinese, Russian and Vietnamese as well. 
Chef likes problems related to numbers a lot. He is generally quite good at solving these kinds of problems, but today he got stuck at one number theory problem, and so he asks your help to solve it.

Given a positive integer N, find out how many positive integers X satisfy the equation X + S(X) + S(S(X)) = N, where S(X) denoting sum of digits of X in decimal (base 10) representation.

------ Input ------ 

The only line of the input contains one integer number - N.

------ Output ------ 

Output single integer in a line denoting the count of number of positive integers X satisfying the above given equation.

------ Constraints ------ 

$1 ≤ N ≤ 10^{9}$

----- Sample Input 1 ------ 
6
----- Sample Output 1 ------ 
1
----- explanation 1 ------ 
Example 1. Only one positive integer X = 2 satisfies the equation X + S(X) + S(S(X)) = 6, as X + S(X) + S(S(X)) = 2 + 2 + 2 = 6.

----- Sample Input 2 ------ 
9939
----- Sample Output 2 ------ 
4
----- explanation 2 ------ 
Example 2.X can be 9898, 9907, 9910 and 9913. 
9898 + S(9898) + S(S(9898)) = 9898 + 34 + 7 = 9939
9907 + S(9907) + S(S(9907)) = 9907 + 25 + 7 = 9939
9910 + S(9910) + S(S(9910)) = 9910 + 19 + 10 = 9939
9913 + S(9913) + S(S(9913)) = 9913 + 22 + 4 = 9939
You can verify that there is not other positive value of X satisfying the given equation.