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

inputFormat

Input

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

A op B

outputFormat

Output

Evaluate the formula and print the result.

Examples

Input

1 + 2

Output

3

Input

5 - 7

Output

-2

样例

1 + 2

3