It Works Perfect but compiler does not excepts my code. HELP please

Question about the task

Three numbers

Java Syntax, Level 4, Lesson 6

Resolved

Use the keyboard to enter three integers. One of the numbers is unique. The other two are identical. Display the ordinal number of the number that is different from the others.

Example for 4 6 6:
1

Example for 6 6 3:
3

Requirements:

The program should read the numbers from the keyboard.
The program should use System.out.println() or System.out.print().
The program should display the ordinal number of the number that is different from the others.
If all the numbers are different, don't display anything.

package com.codegym.task.task04.task0424; /* Three numbers */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //write your code here 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) System.out.println(c); if(a==c) System.out.println(b); if(b==c) System.out.println(a); } }