#include<bits/stdc++.h>
using namespace std;
int main(){
    int n, x;
    cin >> n >> x;
    int cnt = 0;
    for(int i = 1; i <= n; i++){
        int tmp = i;
        while(tmp > 0){
            int d = tmp % 10;
            if(d == x){
                cnt++;
            }
            tmp = tmp / 10;    
        }
    }
    cout << cnt << endl;
    return 0;
}