Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

1 + 2

Sample Output 1

3

Since 1 + 2 = 3, the output should be 3.

Sample Input 2

5 - 7

Sample Output 2

-2

Solution in JavaScript (node.js v5.12) (judge verdict: Accepted)

function Main(input){
var inputs = input.split(" ");
var answer;
if(inputs[1] == "+"){
  answer =new Number( inputs[0]) +new Number( inputs[2]);
}else if(inputs[1] == "-"){
  answer =new Number(inputs[0]) - new Number( inputs[2]);
}
console.log(answer);
}
Main(require('fs').readFileSync('/dev/stdin','utf8'));