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.*;
class Main{
	public static void main(String args[]){
    	Scanner s= new Scanner(System.in);
      	int a=s.nextInt();
      	char str=s.next().charAt(0);
      //System.out.println(str);
      	int b=s.nextInt();
      	
      if(str=='+'){
      	System.out.println(a+b);	
      }else{
      System.out.println(a-b);}
      
    }
}
