#include<bits/stdtr1c++.h>
using namespace std;
int sum,n,x;
int main(){
    cin>>n>>x;
    sum = 0;
    for (int i=1;i<=n;i++){
        int j = i;
        while (j>=1){
            if (j%10 ==x){
                sum += 1;
            } 
            j /= 10;
        }
    }
    cout<<sum;
}