题解 | 记数问题
记数问题
https://www.nowcoder.com/practice/28b2d9f2bf2c48de94a1297ed90e1732?tpId=383&tags=&title=&difficulty=0&judgeStatus=0&rp=0&sourceUrl=%2Fexam%2Foj%2Fta%3FtpId%3D383%26channelPut%3Dacbanner25
#include <iostream>
#include <string>
using namespace std;
int main() {
int n,x;
long count=0;
cin >>n>>x;
for(int i=1;i<=n;i++){
string s=to_string(i);
for(char c:s){
if(c-x=='0')count++;
}
}
cout << count;
}
// 64 位输出请用 printf("%lld")
