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