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.Linq;
namespace Regular_Contest_066
{
    class Program
    {
        static void Main(string[] args)
        {
            /* string a = (Console.ReadLine());
             
             string a3 = a.Substring(4);
             int h = Int32.Parse("" + a1 + "");
             int g = Int32.Parse("" + a3 + "");
             if (a2 == "+") { Console.WriteLine(h+g); }
             else
             {
                 Console.WriteLine(h-g);
             }*/
            string[] a = Console.ReadLine().Split(' ').ToArray();
            int h = Int32.Parse(a[0]);
            int g = int.Parse(a[2]);
            if (a[1] == "+") { Console.WriteLine(h + g); }
            else
            {
                Console.WriteLine(h - g);
            }
            
        }
    }
}