参考答案：

#include<iostream>
#include<string>
using namespace std;
int main()
{
    int n, temp, sum = 0, x;
    cin >> n >> x;
    for (int i = 1; i <= n; ++i)
    {
        temp = i;
        while (temp)
        {
            if (temp % 10 == x)
                ++sum;
            temp /= 10;
        }
    }
    cout << sum << endl;
    return 0;
}