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 Scala (2.11.7) (judge verdict: Accepted)

object Main {
	def main(args: Array[String]): Unit = {
		val sc = new java.util.Scanner(System.in)

    	val a: Int = sc.nextInt
    	val op: String = sc.next
    	val b: Int = sc.nextInt

    	op match {
    		case "+" => println(a + b)
    		case "-" => println(a - b)
    	}
	}
}