using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.CompilerServices;
using System.Security.Principal;
public class MainClass
{
internal static void A()
{
B(10, 50);
}
internal static void B(int x, int y)
{
C("Hello", x * y);
}
internal static void C(string label, int num)
{
StackTrace trace = new StackTrace();
Console.WriteLine(trace.ToString());
}
public static void Main()
{
A();
}
}