Problem:
Score : 100 points

Problem Statement

You are given three integers, A, B and C.

Among them, two are the same, but the remaining one is different from the rest.

For example, when A=5,B=7,C=5, A and C are the same, but B is different.

Find the one that is different from the rest among the given three integers.

Constraints

-100 \leq A,B,C \leq 100

A, B and C are integers.

The input satisfies the condition in the statement.

Input

Input is given from Standard Input in the following format:

A B C

Output

Among A, B and C, print the integer that is different from the rest.

Sample Input 1

5 7 5

Sample Output 1

7

This is the same case as the one in the statement.

Sample Input 2

1 1 7

Sample Output 2

7

In this case, C is the one we seek.

Sample Input 3

-100 100 100

Sample Output 3

-100

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

    import java.util.*;
    public class Main {
     
    	public static void main(String[] args) {
    			
    		Scanner scan=new Scanner(System.in);
    		
    		int a=Integer.parseInt(scan.next());
    		int b=Integer.parseInt(scan.next());
    		int c=Integer.parseInt(scan.next());
    		
    		if (a==b) {
    			System.out.print(c);
    		}else if (a==c) {
    			System.out.print(b);
    		}else if (c==b) {
    			System.out.print(a);
    		}
    		
    		
    	
  
    				
 
     
    }
    }