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
#include<iostream>
using namespace std;
int main(){
int A,B;
cin>>A;
char op;
cin>>op;
cin>>B;
   if(op=='+')
    cout<<A+B;
   else cout<<A-B;
return 0 ;
}
