#include <iostream>
#include <cstdio>
#include <string>
using namespace std;
int a[30];
string s;
int main()
{
	int i,j,n,m,b,c,d,e;
	cin>>s;
	a[1]=1;
	a[0]=1;
	for(i=2;i<=s.size();i++)
	{
		a[i]=a[i-1];
		b=s[i-2]-'0';
		b=b*10;
		b=b+(s[i-1]-'0');
		if(s[i-2]!='0' && b<=20)
			a[i]=a[i]+a[i-2];
	}
	cout<<a[s.size()]<<endl;
	return 0;
}