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Score : $100$ points

### 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