public static int isRapidlyIncreasing(int[] a)
        {
            if (a.Length == 1)
                return 1;

            int isRapidlyIncreasing = 1;
            for (int i = 1; i < a.Length; i++)
            {
                if (a[i] <= GetSumOfPreceedingElements(a, i) * 2)
                    return 0;

            }
            return isRapidlyIncreasing;
        }

        public static int GetSumOfPreceedingElements(int[] a,int currentIndex)
        {
            int sum = 0;
            for (int i = 0; i < currentIndex; i++)
            {
                sum += a[i];
            }
            return sum;
        }