#include<stdio.h>

int main()

{

int num,x;

int i = 1;

int cnt=0;

scanf_s("%d%d", &num, &x);

for (i = 1; i<=num; i++)

{

int temp = i;

while (temp>0)

{

if (temp% 10 == x)

cnt++;

temp/= 10;

}

}

printf("%d\n", cnt);

}