#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,num;
cin >> n >> num;
int i,count=0;
for(i=0;i<=n;i++)
{
    int term=i;
    while(term>0)
    {
        if(term%10==num)  count++;
        term/=10;
    }
}
cout << count;    
}