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 <cstdio>
int main(){
int A,B;
char op;
scanf("%d %c %d",&A,&op,&B);
if(op=='+'){
printf("%d",A+B);
}else{
printf("%d",A-B);
}

return 0;
}