#include<bits/stdc++.h>
using namespace std;
int m,a,b,k,ans;
int main()
{
	cin>>a>>b;
	if(b<10)
		cout<<0;
	if(b<100)
		cout<<1;
	while(n!=0)
	{
		n/10;
		m++; 
	}
	for(int i=101;i<=m-1;i++)
	{
		ans=2;
		if(n==0)
			return 0;
		if(n%10==0)
			ans++;
	}
	cout<<ans;
	return 0;
}