NoRepeatInteger

import java.util.*;public class NoRepeatInteger {public static void main(String[] args) {Scanner s = new Scanner(System.in);String str = s.nextLine();str= str.trim();String result = NoRepeat(str);System.out.println(result);}public static String NoRepeat(String str){if(str==null||str.trim().length()<0) return str;StringBuilder sb = new StringBuilder();sb.append(str);sb.reverse();String str2 = sb.toString();char[] c = str2.toCharArray();int len = c.length;ArrayList<Character> list = new ArrayList<Character>();for(int i=0;i<len;i++){if(!list.contains(c[i])){list.add(c[i]);}}StringBuilder sb2 = new StringBuilder();if(list.size()>1){if(list.get(0)=='0'){for(int i=1;i<list.size();i++){sb2.append(list.get(i));}}else{for(int i=0;i<list.size();i++){sb2.append(list.get(i));}}}else{if(list.get(0)=='0'){sb2.append("0");}else{sb2.append(list.get(0));}}return sb2.toString();}}