- chenxueze's blog
计数问题
- 2025-2-5 14:25:59 @
```
```
#include<bits/stdc++.h>
using namespace std;
int main () {
long long n, x, c = 0;
cin >> n >> x;
for(long long i = 1; i <= n; i++) {
long long num = i;
while(num != 0) {
if(num % 10 == x) c++;
num /= 10;
}
}
cout << c << endl;
return 0;
}