#include<iostream>
using namespace std;
int main()
{
	int n,c,nr,x,y;
	cout<<"n="; cin>>n;
	cout<<"c="; cin>>c;
	nr=0;
	for(x=1;x<=n;x++)
	{ 
		y=x;
		while(y>0)
		{
			if(y%10==c) nr++;
			y=y/10;
		}
	}
	cout<<nr;
	return 0;
}