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 Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);//Scanner型の変数sにインスタンス化したメソッドを代入
		int A = s.nextInt();
		int B = s.nextInt();
		String op = s.next();
		
		if (op.equals("+")) {
			System.out.println(A + B);
		} else if (op.equals("-")) {
			System.out.println(A - B);
		}
	}

}