#include<cstdio>
#include<cctype>
#include<algorithm>
using namespace std;
inline int read(){
    char c; while(c=getchar(),!isdigit(c)); int x=c-‘0‘;
    while(c=getchar(),isdigit(c)) x=x*10+c-‘0‘; return x;
}
int main(){
    int n=read(),x=read(),tot=0;
    for(int i=1;i<=n;i+=1){
        int now=i;
        while(now){
            if(now%10==x) tot++;
            now/=10;
        }
    }
    printf("%d",tot);
    return 0;
}