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
import java.util.Scanner;

public class Main{
	public static void main(String[] args)
	{
		Scanner sc =new Scanner(System.in);
		int a=sc.nextInt();
		String op=sc.next();
		int b=sc.nextInt();
		int ans=0;

		if (op.equals("+")) ans=a+b;
		else if(op.equals("-")) ans=a-b;
		
		System.out.println(ans);	
	}
	
} 