using System;
using System.Collections.Generic;
using System.Windows.Forms;

class hb
{
public static class Program
{
/// <summary>
/// 应用程序的主入口点。
/// </summary>

public static void Main()
{
string myInput;
int A;
Console.Write("请输入");
myInput = Console.ReadLine();
A = Int16.Parse(myInput);
if (A < 0)
Console.WriteLine("{0} less than 0", A);
return;
}
}
}