fluttert

using System;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;

namespace CodeEval
{
	internal class Program
	{
		// Hard, longest path of unique characters

fluttert

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;

// Author: Ernst Fluttert
// You can use this without permission
// yet you should mention the author.