题解

#include<iostream>
using namespace std;
int main(){
int a,b,c=0,d,l;
cin>>a>>b;
for(int i=1;i<=a;i++){
l=i;
while(l!=0){
d=l%10;
l=l/10;
if(d==b){
c++;
}
}
}
cout<<c;
return 0;
}