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 C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
class Program
{
	static void Main(string[] args)
	{
		string line = Console.ReadLine();
        string[] chars = line.Split(' ');
        int num1 = int.Parse(chars[0]);
        int num2 = int.Parse(chars[2]);
        int result = 0;

        if(chars[1] == "+"){
            result = num1 + num2;
        }else{
            result = num1 - num2;
        }

		Console.WriteLine(result);
	}
}