zad 4 1.3.2020.

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

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            double max = 0;
            int i, j;
            double[,] array = new double[5, 4];
            for(i = 0; i<5; i++)
            {
                array[i, 0] = double.Parse(Console.ReadLine());
                array[i, 1] = array[i, 0] * 2;
                array[i, 2] = Math.Round(Math.PI * Math.Pow(array[i, 0], 2),2);
                array[i, 3] = Math.Round(Math.PI * array[i, 1],2);
            }
            for (i = 0; i < 5; i++)
            {
                for (j = 0; j < 4; j++)
                    Console.Write(array[i, j] + " ");
                Console.WriteLine();
            }
            for (i = 0; i < 5; i++)
            {
                if (max < array[i, 0]) max = array[i, 0];
            }
            Console.WriteLine("nai golemiqt radius e " + max);
        }
    }
}
//1
//3,5
//4
//0
//2,2