```
#include<bits/stdc++.h>
using namespace std;
int main() {
int n, x,count;
cin >> n >> x;
count = 0;
for (int i = 1; i <= n; i++) {
int m = 1;
while (i / m >= 1) {
if (i / m % 10 == x) {
count++;
}
m *= 10;
}
}
cout << count << endl;
return 0;
}
```
无需特判；
by chenzixuan49 @ 2024-03-30 16:43:00
```
# include<bits/stdc++.h>
using namespace std;
int main()
{
int n, x, m, l;
cin >> n >> x;
m = 0;
for (int w = 1 ; w <= n ; w++) {
l = w;
while(1 <= l) {
if (l % 10 == x) {
m++;
}
l /= 10;
}
}
cout << m;
return 0;
}
```
这样做会更好理解；
by chenzixuan49 @ 2024-03-30 16:44:04