import java.util.*;
public class Solution {
/**
* @param str string字符串 待判断的字符串
* @return bool布尔型
*/
public boolean judge (String str) {
// write code here
char[] ch = str
import java.util.*;
public class Solution {
/**
* @param str string字符串 待判断的字符串
* @return bool布尔型
*/
public boolean judge (String str) {
// write code here
char[] ch = str