import java.util.*; public class Solution { /** * 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可 * * * @param num string字符串 * @return string字符串 */ public String maxLexicographical(String num) { // write code here StringBuilder sb = new StringBuilder(num); int len = num.length(); for (int i = 0; i < len; i+...