题解 | #表示数字#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        StringBuilder sb = new StringBuilder();
        String[] charArr = s.split("[0-9]+");
        String[] numArr = s.split("[^0-9]+");
        // 1 e 2  ["" , "e"]  ["1", "2"]
        // e 1 e  ["e" , "e"]  ["" , "1"]
        int i = 0, j = 0;
        if (!Character.isDigit(s.charAt(0))) {
            j = 1;
        }
        for (; i < charArr.length; i++, j++) {
            sb.append(charArr[i]);
            if (j < numArr.length) {
                sb.append("*").append(numArr[j]).append("*");
            }
        }
        System.out.println(sb);
    }
}