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);
        int num = in.nextInt();
        int temp[] = new int [10];
        int bound = 0;
        for( ; num > 0; num /= 10){
            temp[bound++] = num % 10;
        }
        System.out.print(temp[0]);
        for(int i = 1; i < bound; i++){
            int count = 0;
            for(int j = 0; j < i; j++){
                if(temp[i] != temp[j]){
                    count++;
                }
                else{
                    break;
                }
            }
            if(count == i){
                System.out.print(temp[i]);
            }
        }
        in.close();
    }
}