Score : $100$ points
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.
Input is given from Standard Input in the following format:
$A$ $B$ $C$
Among $A$, $B$ and $C$, print the integer that is different from the rest.
5 7 5
This is the same case as the one in the statement.
1 1 7
In this case, $C$ is the one we seek.
-100 100 100