Contest: Task: Related: TaskB

Score : $100$ points

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.

- $1≦A,B≦10^9$
- $op$ is either
`+`

or`-`

.

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

$A$ $op$ $B$

Evaluate the formula and print the result.

1 + 2

3

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

5 - 7

-2