#include <stdio.h>

int main() {
    int n,x,i;
    scanf("%d %d",&n,&x);
    int count=0;
    for(i=1;i<=n;i++)
    {
        int b=i,t;
  do 
  {
    t=b%10;
    b/=10;
  if(t==x) count++;
  }while(b!=0);
    }
    printf("%d",count);
    return 0;
}