#include<cstdio>
#include<iostream>
#include<vector>
#include<cmath>
#include<algorithm>
#include<string>
#include<set>
#include<map>
#include<ctime>
#include<cstring>
#include<cassert>
#include<bitset>
#include<sstream>
#include<queue>
#include<stack>
#include<utility>
#include<deque>
#include<functional>
#include<cstdlib>
#include<memory.h>
#include<numeric>
#include<iomanip>
using namespace std;

int main()
{
int n,x,s=0;
cin>>n>>x;
for(int i=1;i<=n;i++)
{
int t=i;
while(t>0)
{
if(t%10==x) s++;
t/=10;
}
}
cout<<s;
}