#include<iostream>
#include<cmath>
using namespace std;

int main()
{
	long long n, x, i =1 ,ans=0;
	cin >> n >> x;
	
	while (i <= n)
	{
		int len = sizeof(i) / 4 - 1;
		for (int a = len; a > 0; a--) 
		{
			int len = sizeof(i) / 4 - 1;
			int num = i / (pow(10, len));
			i /= 10;
			if (num == x)
			{
				ans++;
			}
		}
		i++;
	}
	cout << ans << endl;
	return 0;
}