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 12.16.1) (judge verdict: Accepted)

let [a, op, b] = require("fs").readFileSync("/dev/stdin", "utf8").split(" ");
[a, b] = [a, b].map(Number);
console.log(op == "+" ? a + b : a - b);