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 number1 = Integer.parseInt(reader.readLine());
int number2 = Integer.parseInt(reader.readLine());
int number3 = Integer.parseInt(reader.readLine());
//num1
if (number2 == number3){
System.out.println(number1);
}
else if (number1==number3) {
//n2
System.out.println(number2);
}
else if (number1 == number2) {
//num3
System.out.println(number3);
}
}
}
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 number1 = Integer.parseInt(reader.readLine());
int number2 = Integer.parseInt(reader.readLine());
int number3 = Integer.parseInt(reader.readLine());
//num1
if (number2 == number3){
System.out.println(number1);
}
else if (number1==number3) {
//n2
System.out.println(number2);
}
else if (number1 == number2) {
//num3
System.out.println(number3);
}
}
}