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: Wrong Answer)

function Main(input) {

  var args = input.split("\n");
  var n = args[0];
  var times = args[1].split(" ");
  var m = args[2];
  var drink_set = [];
  for(var i = 3; i < args.length; i++) {
    drink_set.push(args[i]);
  }

  for(var i = 0; i < m; i++) {
    times[drink_set[i][0]] = drink_set[i][1];
    var sum = 0;
    for(var j = 0; j < n; j++) {
      sum += parseInt(times[j], 10);
    }
    console.log(sum);
  }

}
//*この行以降は編集しないでください（標準入出力から一度に読み込み、Mainを呼び出します）
Main(require("fs").readFileSync("/dev/stdin", "utf8"));