include <stdio.h>

int main() {

int a, b, i, j, c;
scanf("%d %d", &a, &b);
c = 0;
for (i = 1; i <= a; i++) {
	j = i;
	while (j > 0) {
		if (j % 10 == b) {
			c++;
		}
		j = j / 10;
	}
}
printf("%d", c);
return 0;

}