#include<iostream>
#include<cstdio>
#include<cstring>
#include<map>
#include<cmath>
#include<queue>
#include<algorithm>
#include<vector>
using namespace std;
long long n,m,ans=0,a;
int main()
{
cin>>n>>m;
for(int i=1;i<=n;i++)
{
while(i)
{
a=i%10;
if(a==m)
{
ans++;
a=0;
continue;
}
i=i/10;
}
}
cout<<ans;
return 0;
}