Problem Description

Given the lengths of three sides of a rectangle, find the length of the remaining side.

Input Format

The input is given from the standard input in the following format:

$ l_1 $ $ l_2 $ $ l_3 $

• The first line contains three integers $ l_1 $, $ l_2 $, and $ l_3 $ ($1 \leq l_1, l_2, l_3 \leq 10$), representing the lengths of three sides of the rectangle.

Output Format

Output the length of the remaining side of the rectangle. It is guaranteed that there is exactly one answer. End the output with a newline.

Sample Input and Output

Sample Input #1

1 1 2

Sample Output #1

2

Sample Input #2

4 3 4

Sample Output #2

3

Sample Input #3

5 5 5

Sample Output #3

5

Notes/Hints

Sample Explanation 1

This is a $1 \times 2$ rectangle.

Sample Explanation 2

The input can be given in any order.

Sample Explanation 3

A square is also considered a rectangle.

见题面 Input 部分

见题面 Output 部分