#include<stdio.h>
int main()
{
    int n,i,t,s=0,x;
    scanf("%d%d",&n,&x);
    for(i=1;i<=n;i++)
    {
        t=i;
        while(t!=0)
        {
            if(t%10==x)
                s++;
            t=t/10;
        }
    }
    printf("%d",s);
    return 0;
}

/**************************************************************
	Problem: 1469
	User: admin
	Language: C
	Result: Accepted
	Time:30 ms
	Memory:1144 kb
****************************************************************/