70分求助

#include<bits/stdc++.h>
using namespace std;
int a, b, c = 0; 
int main() {
    cin >> a >> b;
    for (int i = 0; i <= a; i++) {
        
        int num = i;
        while (num > 0) {
            if (num % 10 == b) { 
                c++;
            }
            num = num / 10; 
        }
        
        if (i == 0 && b == 0) {
            c++;
        }
    }
    cout << c << endl; 
    return 0;
}