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);
		long a = sc.nextLong();
		String op = sc.next();
		long b = sc.nextLong();
		
		switch(op){
			case "+":
				System.out.println((long)(a + b));
				break;
			case "-":
				System.out.println((long)(a - b));
		}
		sc.close();
	}
}
