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)
	{
		// 整数の入力
		// スペース区切りの整数の入力
		string[] input = Console.ReadLine().Split(' ');
		int b = int.Parse(input[0]);
		string c = input[1];
		int d = int.Parse(input[2]);
		if(c=="+")
		Console.WriteLine(b+d);
      if(c=="-")Console.WriteLine(b-d);
	}
}