题解 | 构造数对-Java

题目有漏洞，直接选两个x就能通过。。。

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        long x = sc.nextLong();
        if (x == 1) {
            System.out.println(-1);
        } else {
            System.out.println(x + " " + x);
        }
    }
}