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: Accepted)

import java.util.*;
public class Main{
	public static void main(String args[]) {
		Scanner sc=new Scanner(System.in);
	    int A=sc.nextInt();
	    String OP=sc.next();
	    int B=sc.nextInt();
	    int K=0;
	    switch(OP) {
	    case "+":
	        K=A+B;
	    	System.out.println(K);
	    	break;
	    case "-":
	    	K=A-B;
	    	System.out.println(K);
	    }
	    
	}
}