When I test all possibilities it works but 3rd requirement somehow does not tick as correct. Any ideas?
package pl.codegym.task.task04.task0424;
/*
Trzy liczby
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = Integer.parseInt(reader.readLine());
if (a==b&&b!=c)
System.out.println(c);
else if (a==c&&c!=b)
System.out.println(b);
else if (b==c&&c!=a)
System.out.println(a);
else if (a==b&&b==c)
System.out.println();
}
}