# Input/Output

## Read from STDIN, Write to STDOUT

{% tabs %}
{% tab title="C#" %}
```csharp
using System;

public class Program {
    public static void Main() {
        int N = int.Parse(Console.ReadLine()); //Reading input from STDIN
        Console.WriteLine(N * 2); // Writing output to STDOUT
        string S = Console.ReadLine();
        Console.WriteLine(S);
    }
}
```
{% endtab %}
{% endtabs %}
