题解 | 记数问题
记数问题
https://www.nowcoder.com/practice/28b2d9f2bf2c48de94a1297ed90e1732
import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int x = in.nextInt();
int cnt = 0;
for(int i = 1;i<=n;i++){
int num = i;
while(num!=0){
if(num%10==x){
cnt++;
}
num = num/10;
}
}
System.out.println(cnt);
}
}
