import java.util.Scanner;

public class Main2 {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int n,x;
        n=scanner.nextInt();
        x=scanner.nextInt();
        String a=Integer.toString(x);
        int num=0;
        int j=0;
        StringBuilder sb=new StringBuilder();
        for (int i = 0; i < n; i++) {
            sb.append(i+1);
        }
      
        String[] str=sb.toString().split("");
        for (int i = 0; i < str.length; i++) {
            if(str[i].contains(a) ) num++;
        }
        System.out.println(num);
    }
}