P65Ex14

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 40, max = 0, current, maxIndex = 0, count = 0, j, sum = 0;
            int[,] arr = new int[n, 30];
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (int k = 0; k < arr.GetLength(1); k++)
                {
                    arr[i, k] = int.Parse(Console.ReadLine());
                }
            }
            for (int i = 0; i < arr.GetLength(1); i++)
            {
                current = 0;
                for (int k = 0; k < arr.GetLength(0); k++)
                {
                    arr[k, i] = int.Parse(Console.ReadLine());
                    current += arr[k, i];
                }
                if (current > max)
                {
                    maxIndex = i;
                    max = current;
                }
            }
            Console.WriteLine("Best selling: " + maxIndex + 1);
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                j = 0;
                while (j < arr.GetLength(1) && arr[i, j] != 0)
                    j++;
                if (j == arr.GetLength(1))
                    count++;
            }
            Console.WriteLine("Teenagers who own all 30 discs: " + count);
            for (int i = 0; i < arr.GetLength(0); i++)
            {
                for (j = 0; j < arr.GetLength(1); j++)
                    sum += arr[i, j];
            }
            Console.WriteLine("Average amount of discs per teen: " + (double)sum / arr.GetLength(0));
            // ד - כן
        }
    }
}