p03844 AtCoder Beginner Contest 050 - Addition and Subtraction Easy
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.

Examples

Input

1 + 2


Output

3


Input

5 - 7


Output

-2
```python
a,b,c=input().split();print(int(a)+int(c)if b=='+'else int(a)-int(c))
```