import java.util.Scanner; import java.util.ArrayList; public class Main2 {

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    ArrayList<Integer> list = new ArrayList<>();

    //表示1到n的n
    int n = sc.nextInt();

    //表示要计数的数字
    int x = sc.nextInt();

    //集合中添加1到n的n
    for (int i = 1; i <= n; i++) {
        list.add(i);
    }

    //遍历集合，计算其中出现多少次x
    int count = 0;
    for (int i = 0; i < list.size(); i++) {
        //用一个临时变量temp来存储当前元素的值
        int temp = list.get(i);

        //计算temp里有几个x
        while (temp > 0) {
            if (temp % 10 == x) {
                count++;
            }
            temp = temp / 10;
        }
    }
    System.out.println(count);
}

}