import java.util.Scanner;

public class Main {

    public static void main(String[] args)
    {
        Scanner in=new Scanner(System.in);
        int n=in.nextInt();
        int x=in.nextInt();
        String strx=String.valueOf(x);
        char cx=strx.charAt(0);//将整数变换成字符
        int total=0;
        for(int i=1;i<=n;i++)
        {
            String str=String.valueOf(i);//将整数变换为字符串

            for(int j=0;j<str.length();j++)
            {
                if(str.charAt(j)==cx) total++; //遍历字符串中的每一个字符
            }
        }
        System.out.println(total);
    }

}

/**************************************************************
	Problem: 1993
	User: admin
	Language: Java
	Result: Accepted
	Time:5171 ms
	Memory:76628 kb
****************************************************************/