??? Логически же все правильно)
package com.javarush.task.task04.task0417;
/*
Существует ли пара?
*/
import java.io.*;
import java.util.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader (new InputStreamReader (System.in)) ;
String number1 = reader.readLine () ;
String number2 = reader.readLine () ;
String number3 = reader.readLine () ;
int num1 = Integer.parseInt (number1) ;
int num2 = Integer.parseInt (number2) ;
int num3 = Integer.parseInt (number3) ;
if (num1 == num2 && num2 !=num3 ) {
System.out.println (num1 + " " + num2) ;
} else if (num1 == num3 && num3 != num2 ) {
System.out.println ( num1 + " " +num2) ;
} else if (num2 == num3 && num2 != num1) {
System.out.println (num2 + " " +num3) ;
} else if (num1 == num2 && num1 == num3)
System.out.println (num1 + " " + num2+ " " +num3) ;
}
}
//напишите тут ваш код