题解 | 牛牛数数

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i=1;i<=n;++i){
            if(Four(i)) continue;
            if(i%4==0) continue;
            System.out.println(i);   
        }
    }
    public static boolean Four(int n){
        while(n>0){
            if(n%10==4){
                return true;
            }
            n/=10;
        }
        return false;
    }
}

只需暴力枚举即可