8- 4

#include<iostream.h>
int p2(int &n)
{n=n/10;}
int p1(int &n){
int s=0;
while(n!=0){
	s=s+n%10;
	n=n/10;}
n=s;}
int main(){
int n,x,y,s=0;
cin>>n;
while(n>0){
	x=n;
	p2(n);
	y=n;
	p1(y);
	p1(x);
	if(x==y)
		s++;}
cout<<s;}