using System;

using System.Collections.Generic;

using System.Linq;

namespace Euler_Problem_0000002

{

internal class Program

{

private static void Main()

{

var validIntList = new List<Int64>();

Int64 j = 0;

Int64 i = 1;

while (i < 4000000)

{

if (IsEven(i))

{

validIntList.Add(i);

}

Int64 g = i;

i = j + i;

j = g;

}

if (validIntList.Count > 0)

{

Int64 total = validIntList.Aggregate<long, long>(0, (current, l) => current + l);

Console.WriteLine(total);

}

Console.ReadLine();

}

private static bool IsEven(Int64 i)

{

return i%2 == 0;

}

}

}