题解 | #表示数字#

import java.util.*;

// 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);
        String s = in.nextLine();
        int temp = 0;
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c >= '0' & c <= '9') {
                if (temp == 0) {
                    temp = 1;
                    System.out.print("*" + c);
                }else{
                    System.out.print(c);
                }
            } else if (temp == 1) {
                temp = 0;
                System.out.print("*" + c);
            } else {
                System.out.print(c);
            }
        }
        if(temp==1){
            System.out.print("*");
        }
    }
}