Vlajnost

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


class Program
{
    static void Main()
    {
        int n = int.Parse(Console.ReadLine());
        double sum = 0;
        double averageWet = 0;
        double daily = 0;

        double[,] arr = new double[n,12];

        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < 12; j++)
            {
                Console.Write("{0}.Enter value:", j + 1);
                arr[i, j] = double.Parse(Console.ReadLine());
            }
        }

        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < 12; j++)
            {
                sum += arr[i, j];
            }
            daily = sum / 12;
            averageWet += daily;
            sum = 0;
        }
        averageWet /= n;

        Console.WriteLine("The average wet is: {0}", averageWet);
    }
}