Problem Statement

Joisino wants to evaluate the formula "$A$ $op$ $B$". Here, $A$ and $B$ are integers, and the binary operator $op$ is either + or -. Your task is to evaluate the formula instead of her.

Constraints

• $1≦A,B≦10^9$
• $op$ is either + or -.

Input

The input is given from Standard Input in the following format:

$A$ $op$ $B$

Output

Evaluate the formula and print the result.

Sample Input 1

1 + 2

Sample Output 1

3

Since $1 + 2 = 3$, the output should be $3$.

Sample Input 2

5 - 7

Sample Output 2

-2