#include<iostream>
#include<cmath>
#include<stdio.h>
using namespace std;
int main()
{
	int n,x;
	cin>>n>>x;
	int count = 0;
	for(int i = 1;i <= n;i++)
	{
		while(i >= 10)
		{
			int j = i % 10;
			if(j == x)
			{
			    count++;
			}
			i = i / 10;
		}
		
		if(i == x)
		{
			count++;
		}
	}
	cout<<count<<endl;
	return 0;
}