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

https://www.luogu.com.cn/record/92368166