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