Equal Sums_27.05.2016

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EqualSums_27._05._2016
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] number = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

            int sumLeft = 0;
            int equalIndex = 0;

            for (int i = 0; i <= (number.Length - 1) / 2; i++)
            {
                sumLeft += number[i];
            }

            for (int iReverse = 0; iReverse < number.Length / 2; iReverse++)
            {
                if (number[number.Length - 1 - iReverse] ==  sumLeft)
                {
                    for (int j = number.Length / 2; j < number.Length; j++)
                    {
                        if (number[j] == sumLeft)
                        {
                            equalIndex = j;
                            break;
                        }
                        break;
                    }

                }
            }
            Print(number, equalIndex);
        }

        static void Print (int[] inputNumbers, int equalIndex)
        {
            if (equalIndex > 0)
            {
                Console.WriteLine(equalIndex);
            }
            else if (equalIndex == 0 && inputNumbers.Length == 1)
            {
                Console.WriteLine(0);
            }
            else if (equalIndex == 0 && inputNumbers.Length > 1)
            {
                Console.WriteLine("no");
            }
        }

    }
}