Где ошибка?
package com.javarush.task.task04.task0424;
/*
Три числа
*/
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 && a!=c){
System.out.println(1);
}
else if(b!=a && b!=c){
System.out.println(2);
}
else if(c!=a && c!=b){
System.out.println(3);
}
}
}