Problem Statement

The function ReLU is defined as follows:

Given an integer x, find ReLU(x).

Input

Input is given from Standard Input in the following format:
x

Output

Print the answer as an integer.

Constraints

• x is an integer.
• -$10 \leq x \leq 10$

Sample Input 1

1

Sample Output 1

1

We have $1 \geq 0$, so ReLU(1) = 1.

Sample Input 2

0

Sample Output 2

0

Sample Input 3

-1

Sample Output 3

0

见题面 Input 部分

见题面 Output 部分