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 <bits/stdc++.h>
using namespace std;
int main(){
  char c;
  int a,b; cin>>a>>c>>b;
  if(c=='+') cout<<(a+b);
  else cout<<(a-b);
  
 return 0; 
}