вроде все правильно, или??
package com.javarush.task.task04.task0424;
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader buf = new BufferedReader(new InputStreamReader(System.in));
String s = buf.readLine();
int a = Integer.parseInt(s);
String m = buf.readLine();
int b = Integer.parseInt(m);
String h = buf.readLine();
int c = Integer.parseInt(h);
if (a != b & a != c ){
System.out.print("1");
}
else if (b != a & b != c) {
System.out.print("2");
}
else if
(c != a & c != b) {
System.out.print("3");
}
else
System.out.println();
}
}