﻿namespace topCoder
{
	using System;
	using System.Collections.Generic;

	class main
	{
		static void Main(string[] args)
		{
			//p1 o = new p1();
			//o.foo();

			//p2 o = new p2();
			//o.foo();

			//p3 o = new p3();
			//o.foo();

			p4 o = new p4();
			o.foo();

			Console.ReadLine();
		}
	}
}
