вот код
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 sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
if (a==b) {
if (b==c){
System.out.println(a + " " + b + " " + c);
}else{
System.out.println(a + " " + b);
}
} else if (a==c){
System.out.println(a + " " + c);
}else if (a==b){
System.out.println(a + " " + b);
}
}
}