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 = Integer.valueOf(sc.next());
		String op = sc.next();
		int b = Integer.valueOf(sc.next());
		int ans = 0;
		if (op.equals("+"))
			ans = a + b;
		if (op.equals("-"))
			ans = a - b;
		System.out.println(ans);
		sc.close();
	}
}