题解 | #提取不重复的整数#

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        long n = in.nextLong();
        //去重数组
        int[] index = new int[10];
        long num =0;
        while(n != 0){
            int t = (int)n%10;
            n/=10;
            if(index[t]!=6){
                num = num*10+t;
            }
            index[t] = 6;
        }
        System.out.println(num);
    }
}