题解 | #提取不重复的整数#

import java.util.; import java.lang.;

public class Main {

public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);

    int n = sc.nextInt();
    String datas = "";

    while (n > 0) {
        if (!datas.contains(n % 10+"")) {
            datas+=n % 10+"";
        }
        n /= 10;
    }

        System.out.println(datas);
}

}