using System;

​

var count = int.Parse(Console.ReadLine());

var array = new int[count];

var random = new Random();

for (var i = 0; i < array.Length; i++)

{

    array[i] = random.Next(1, 100);

}

Console.WriteLine(string.Join("\t", array));

​

var result = Sum(array);

Console.WriteLine(result);

​

static int Sum(int[] array, int index = 0, int result = 0)

    => index >= array.Length

        ? result

        : Sum(array, index + 1, result + array[index]);