字符数组是0---n-1
by 已注销HeBhs37KwrDer @ 2019-05-09 22:28:22
```c
#include <iostream>
using namespace std;
int main() {
long long n, x, di, count = 0;
cin >> n >> x;
for (int i = 1; i <= n; i++) {
di = i;
while (di) {
if (di % 10 == x) {
count++;
}
di /= 10;
}
}
cout << count << endl;
return 0;
}
```
by hantingsheng @ 2019-05-22 10:29:38
就是这样
by hantingsheng @ 2019-05-22 10:31:49