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#include<bits/stdc++.h>
using namespace std;
int main() {
int ans=0,i,n,x,tmp;
cin>>n>>x;
for(int i=1; i<=n; i++) {
tmp=i;
while(tmp>=1) {
if(tmp%10==x) ans++;
tmp/=10;
}
}
cout<<ans;
return 0;
}