Sanya 2

using System;

namespace array
{
		}
class MainClass
{
	public static void Main (string[] args)
	{
		Console.WriteLine ("Hello World!");

		Random rand = new Random ();
		int M, N;

		Console.WriteLine ("M:");
		M = Convert.ToInt32 (Console.ReadLine());


		Console.WriteLine ("N:");
		N = Convert.ToInt32 (Console.ReadLine());

		int[,] Mass = new int[M, N];
		for (int i = 0; i < M; i++) {
			for (int j = 0; j < N; j++) {
				Mass [i, j] = rand.Next (0, 9);
				Console.Write (Mass [i, j].ToString () + " ");
			}
			Console.WriteLine ("");
		}

		int diagonalSumm = countDiag (Mass);

		Console.WriteLine ("Cумма главной диагонали: " + diagonalSumm.ToString ());

		Console.WriteLine ("Строки, сумма элементов которых меньше суммы главной диагонали:");

		for (int i = 0; i < M; i++) {
			int summ = 0;
			for (int j = 0; j < M; j++) {
				summ = summ + Mass [i, j];
			}
			if (summ < diagonalSumm) {
				Console.WriteLine (i.ToString ());
			}
		}
	}

	public static int countDiag(int[,] Mass) {
		if (Mass.GetLength(0) == Mass.GetLength(1)) {
			int diagonalSumm = 0;
			for (int i = 0; i < Mass.GetLength(0); i++) {
				diagonalSumm = diagonalSumm + Mass [i, i];
			}
			return diagonalSumm;
		} else {
			Console.WriteLine("Матрица не квадратна");
			return 0;
		}
	}
}