题解 | #提取不重复的整数#
提取不重复的整数
http://www.nowcoder.com/practice/253986e66d114d378ae8de2e6c4577c1
import java.util.*;
public class Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
HashSet<Integer> hs = new HashSet<>();
int num = sc.nextInt();
while(num%10!=0){
if(hs.add(num%10)){
System.out.print(num%10);
}
num = num/10;
}
}
}