Вывод верный, но тест не проходит.
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package com.javarush.task.pro.task03.task0305;
import java.util.Scanner;
/*
Три числа
*/
public class Solution {
public static void main(String[] args) {
//напишите тут ваш код
Scanner scan = new Scanner(System.in);
int a = scan.nextInt();
int b = scan.nextInt();
int c = scan.nextInt();
boolean ab = (a == b);
boolean bc = (b == c);
boolean ac = (a == c);
if (ab == bc) {
System.out.print(a + " " + b + " " + c);
} else if (ab) {
System.out.print(a + " " + b);
} else if (bc) {
System.out.print(b + " " + c);
} else if (ac) {
System.out.print(a + " " + c);
} else
{
}
}
}