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.*;
import static java.lang.System.*;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(in);
int a = Integer.parseInt(sc.next());
String op=sc.next();
int b = Integer.parseInt(sc.next());
if(op.equals("+")){
    out.println(a+b);
}else{
    out.println(a-b);
}
}}