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;
using System.Collections.Generic;
using static System.Console;
using System.Linq;


class Program
{
    static void Main(string[] Args) {
        var lis = new List<string>(ReadLine().Split(' '));
        int A = Int32.Parse(lis[0]);
        int B = Int32.Parse(lis[2]);
        if (lis[1] == "-") B *= -1;

        WriteLine(A + B);

        ReadLine();
    }
}