using System;

public class Program

{

    public static void Main()

    {

            var numbers = new int[] { 12, 15, 17, 19 };

            int sumOfCumulativeSums = CumulativeSums2(numbers);

            Console.Write(" total " + sumOfCumulativeSums + "\n");

​

    }

    private static int CumulativeSums(int[] values)

{

    if (values == null || values.Length <= 1) return 0;

​

    var results = new int[values.Length];

    results[0] = values[0] + values[1];

​

    for (var i = 1; i < values.Length - 1; i++)

    {

        results[i] = results[i - 1] + values[i + 1];

    }

        int sum =0;

​

         for(int i=0;i<results.Length;i++)

         {

            sum = sum + results[0];

         }

        return sum;

}

    public static int CumulativeSums2(int[] values)

{

    if (values == null || values.Length == 0) return 0;

​

    var results = new int[values.Length];

    results[0] = values[0];

​

    for (var i = 1; i < values.Length; i++)

    {

        results[i] = results[i - 1] + values[i];

    }

​

      int sum2 =0;

​

         for(int i=0;i<results.Length;i++)

         {

            sum2 = sum2 + results[0];

         }

        return sum2;

}

}