using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Random ran = new Random();

            Console.WriteLine("Введите размер массива");

            int n = int.Parse(Console.ReadLine());

​

            int[,] mas = new int[n, 2];

​

            for(int i = 0; i < n; i++)

            {

                    mas[i, 0] = ran.Next(0, 100);

                    mas[i, 1] = mas[i, 0] * mas[i, 0];

            }

​

            for (int i = 0; i < n; i++)

            {

                   Console.WriteLine(mas[i,0] + " \t" + mas[i,1]);

            }

    }

}